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Twitter is an American microblogging and social networking service on which users post and ... In February 2010, Twitter users were sending 50 million tweets per day. Twitter FromWikipedia,thefreeencyclopedia Jumptonavigation Jumptosearch Americansocialnetworkingservice "Tweeting"and"Tweeted"redirecthere.Fortheanimalbehavior,seebirdvocalization.Forotheruses,seeTweet(disambiguation). Thisarticlemaybetoolongtoreadandnavigatecomfortably.Thereadableprosesizeis118kilobytes.Pleaseconsidersplittingcontentintosub-articles,condensingit,oraddingsubheadings.Pleasediscussthisissueonthearticle'stalkpage.(September2021) Twitter,Inc.Screenshot Thedefaultpageshowntologged-outusersTypeofbusinessPublicTypeofsiteNews,socialnetworkingserviceAvailable inMultilingualTraded asNYSE: TWTRS&P500ComponentFoundedMarch 21,2006;16yearsago (2006-03-21)HeadquartersSanFrancisco,California,U.S.Area servedWorldwideFounder(s)JackDorseyNoahGlassBizStoneEvanWilliamsKey people BretTaylor(Chair) ParagAgrawal(CEO)[1] NedSegal(CFO)[2] IndustryInternetRevenueUS$3.72billion(2020)OperatingincomeUS$27million(2020)NetincomeUS$−1.14billion(2020)TotalassetsUS$13.37billion(2020)TotalequityUS$7.97billion(2020)Employees5,500+(December2020)[3]SubsidiariesVinePeriscopeURLtwitter.comRegistrationRequiredUsers330millionmonthlyactiveusers(Q12019)LaunchedJuly 15,2006;15yearsago (2006-07-15)Current statusActiveNativeclient(s)oniOS,Android,WindowsPhone,MicrosoftWindows,macOS,WebWritten inJavaRubyScalaJavaScript[4][5][6][7][8][9][10][11][12][13] AtweetsentfromtheInternationalSpaceStationaccount,includingaphotograph,alinkandtwohashtags TwitterisanAmericanmicrobloggingandsocialnetworkingserviceonwhichuserspostandinteractwithmessagesknownas"tweets".Registereduserscanpost,like,andretweettweets,butunregistereduserscanonlyreadthosethatarepubliclyavailable.UsersinteractwithTwitterthroughbrowserormobilefrontendsoftware,orprogrammaticallyviaitsAPIs.PriortoApril2020,serviceswereaccessibleviaSMS.[14]TheserviceisprovidedbyTwitter,Inc.,acorporationbasedinSanFrancisco,California,andhasmorethan25officesaroundtheworld.[15]Tweetswereoriginallyrestrictedto140characters,butthelimitwasdoubledto280fornon-CJKlanguagesinNovember2017.[16]Audioandvideotweetsremainlimitedto140secondsformostaccounts. TwitterwascreatedbyJackDorsey,NoahGlass,BizStone,andEvanWilliamsinMarch2006andlaunchedinJulyofthatyear.By2012[update],morethan100millionusersposted340milliontweetsaday,[17]andtheservicehandledanaverageof1.6billionsearchqueriesperday.[18][19][20]In2013,itwasoneofthetenmost-visitedwebsitesandhasbeendescribedas"theSMSoftheInternet".[21]AsofQ12019[update],Twitterhadmorethan330millionmonthlyactiveusers.[11]Inpractice,thevastmajorityoftweetsarewrittenbyaminorityofusers.[22][23] Contents 1History 1.12006–2007:Creationandinitialreaction 1.22007–2010 1.32010–2014 1.42014–2019 1.52019–present 2Leadership 2.1Listofchairmen 2.2ListofCEOs 3Appearanceandfeatures 3.1Tweets 3.1.1Content 3.1.2Format 3.1.2.1Hashtags,usernames,retweetsandreplies 3.1.2.2TwitterLists 3.1.2.3UsingSMS 3.1.2.4Characterlimits 3.1.2.5URLshortener 3.1.3Trendingtopics 3.1.4Moments 3.2Addingandfollowingcontent 3.3Verifiedaccounts 3.4Mobile 3.5Third-partyapplications 3.6Relatedheadlinesfeature 3.7Polls 3.8Integratedphoto-sharingservice 3.9Streamingvideo 3.10Accountarchival 3.10.1BrowsablelegacyTwitterarchiveformat 3.11Spaces 3.12Fleets 3.13TwitterBlue 3.14TipJar 3.15TheShopModule 3.16SafetyMode 3.17LiveShopping 3.18Shops 4Usage 4.1Demographics 4.2Levelsofuse 5Branding 6Finances 6.1Funding 6.2Revenuesources 6.3Stocklaunchandtaxissues 6.4Contributions 6.5Advertisingbans 6.6Usermonetization 7Technology 7.1Implementation 7.2Interface 7.3Outages 8Useraccounts 8.1Privacy,securityandharassment 8.2Suspectandcontestedaccounts 8.3Maliciousandfakeaccounts 8.4Twitterbots 8.4.1Effects 9Developers 9.1Innovatorspatentagreement 9.2Opensource 10Society 10.1Usage 10.1.1Protesters 10.1.2Governments 10.1.3Far-rightcontent 10.2Impact 10.2.1Instant,short,andfrequentcommunication 10.2.2Emergencyuse 10.2.3Education 10.2.4Publicfigures 10.2.5Worldleaders 10.2.6Religion 10.3Censorshipandmoderation 10.3.1Hashtagsuppression 10.3.2Trust&SafetyCouncil 10.3.3Moderationoftweets 10.3.4ModerationofPresidentDonaldTrump 10.4Fines,penaltiesandsanctions 10.4.1Violationofcampaignfinancelaws 11Television 12Statistics 12.1Useraccountswithlargefollowerbase 12.2Oldestaccounts 12.3Recordtweets 13Seealso 14Notes 15References 16Furtherreading 17Externallinks History Furtherinformation:TimelineofTwitter 2006–2007:Creationandinitialreaction Asketch,c.2006,byJackDorsey,envisioninganSMS-basedsocialnetwork. Twitter'soriginslieina"daylongbrainstormingsession"heldbyboardmembersofthepodcastingcompanyOdeo.JackDorsey,thenanundergraduatestudentatNewYorkUniversity,introducedtheideaofanindividualusinganSMSservicetocommunicatewithasmallgroup.[24][25]Theoriginalprojectcodenamefortheservicewastwttr,thedisemvowelledversionofthewordtwitter,anideathatWilliamslaterascribedtoNoahGlass,[26]inspiredbyFlickrandthefive-characterlengthofAmericanSMSshortcodes.Thedecisionwasalsopartlyduetothefactthatthedomaintwitter.comwasalreadyinuse,anditwassixmonthsafterthelaunchoftwttrthatthecrewpurchasedthedomainandchangedthenameoftheservicetoTwitter.[27]Thedevelopersinitiallyconsidered"10958"asashortcode,butlaterchangeditto"40404"for"easeofuseandmemorability".[28]WorkontheprojectstartedonMarch21,2006,whenDorseypublishedthefirstTwittermessageat9:50 p.m.PST(UTC−08:00):"justsettingupmytwttr".[4] Dorseyhasexplainedtheoriginofthe"Twitter"title:[29] ...wecameacrosstheword"twitter",anditwasjustperfect.Thedefinitionwas"ashortburstofinconsequentialinformation",and"chirpsfrombirds".Andthat'sexactlywhattheproductwas. ThefirstTwitterprototype,developedbyDorseyandcontractorFlorianWeber,wasusedasaninternalserviceforOdeoemployees.[30]ThefullversionwasintroducedpubliclyonJuly15,2006.[12]InOctober2006,BizStone,EvanWilliams,Dorsey,andothermembersofOdeoformedObviousCorporationandacquiredOdeo,togetherwithitsassets—includingOdeo.comandTwitter.com—fromtheinvestorsandshareholders.[31]WilliamsfiredGlass,whowassilentabouthispartinTwitter'sstartupuntil2011.[32]TwitterspunoffintoitsowncompanyinApril2007.[33]Williamsprovidedinsightintotheambiguitythatdefinedthisearlyperiodina2013interview:[34] WithTwitter,itwasn'tclearwhatitwas.Theycalleditasocialnetwork,theycalleditmicroblogging,butitwashardtodefine,becauseitdidn'treplaceanything.Therewasthispathofdiscoverywithsomethinglikethat,whereovertimeyoufigureoutwhatitis.Twitteractuallychangedfromwhatwethoughtitwasinthebeginning,whichwedescribedasstatusupdatesandasocialutility.Itisthat,inpart,buttheinsightweeventuallycametowasTwitterwasreallymoreofaninformationnetworkthanitisasocialnetwork. 2007–2010 ThetippingpointforTwitter'spopularitywasthe2007SouthbySouthwestInteractive(SXSWi)conference.Duringtheevent,Twitterusageincreasedfrom20,000tweetsperdayto60,000.[35]"TheTwitterpeoplecleverlyplacedtwo60-inchplasmascreensintheconferencehallways,exclusivelystreamingTwittermessages,"remarkedNewsweek'sStevenLevy."Hundredsofconference-goerskepttabsoneachotherviaconstanttwitters.Panelistsandspeakersmentionedtheservice,andthebloggersinattendancetoutedit."[36]Reactionattheconferencewashighlypositive.BloggerScottBealesaidthatTwitterwas"absolutelyruling"SXSWi.SocialsoftwareresearcherDanahBoydsaidTwitterwas"owning"theconference.[37]Twitterstaffreceivedthefestival'sWebAwardprizewiththeremark"we'dliketothankyouin140charactersorless.Andwejustdid!"[38] Thecompanyexperiencedrapidinitialgrowth.Ithad400,000tweetspostedperquarterin2007.Thisgrewto100milliontweetspostedperquarterin2008.InFebruary2010,Twitterusersweresending50milliontweetsperday.[39]ByMarch2010,thecompanyrecordedover70,000registeredapplications.[40]AsofJune2010,about65milliontweetswerepostedeachday,equalingabout750tweetssenteachsecond,accordingtoTwitter.[41]AsofMarch2011,thatwasabout140milliontweetsposteddaily.[42]AsnotedonCompete.com,Twittermoveduptothethird-highest-rankingsocialnetworkingsiteinJanuary2009fromitspreviousrankoftwenty-second.[43] JackDorsey,co-founderandCEOofTwitter,in2009 Twitter'susagespikesduringprominentevents.Forexample,arecordwassetduringthe2010FIFAWorldCupwhenfanswrote2,940tweetspersecondinthethirty-secondperiodafterJapanscoredagainstCameroononJune14,2010.Therecordwasbrokenagainwhen3,085tweetspersecondwerepostedaftertheLosAngelesLakers'victoryinthe2010NBAFinalsonJune17,2010,[44]andthenagainatthecloseofJapan'svictoryoverDenmarkintheWorldCupwhenuserspublished3,283tweetspersecond.[45]Therecordwassetagainduringthe2011FIFAWomen'sWorldCupFinalbetweenJapanandtheUnitedStates,when7,196tweetspersecondwerepublished.[46]WhenAmericansingerMichaelJacksondiedonJune25,2009,Twitterserverscrashedafteruserswereupdatingtheirstatustoincludethewords"MichaelJackson"atarateof100,000tweetsperhour.[47]ThecurrentrecordasofAugust3,2013,wassetinJapan,with143,199tweetspersecondduringatelevisionscreeningofthemovieCastleintheSky[48](beatingthepreviousrecordof33,388,alsosetbyJapanforthetelevisionscreeningofthesamemovie).[49] Thefirstunassistedoff-EarthTwittermessagewaspostedfromtheInternationalSpaceStationbyNASAastronautT.J.CreameronJanuary22,2010.[50]BylateNovember2010,anaverageofadozenupdatesperdaywerepostedontheastronauts'communalaccount,@NASA_Astronauts.NASAhasalsohostedover25"tweetups",eventsthatprovideguestswithVIPaccesstoNASAfacilitiesandspeakerswiththegoalofleveragingparticipants'socialnetworkstofurthertheoutreachgoalsofNASA.InAugust2010,thecompanyappointedAdamBainfromNewsCorp.'sFoxAudienceNetworkaspresidentofrevenue.[51][relevant?–discuss] TwitteracquiredapplicationdeveloperAtebitsonApril11,2010.AtebitshaddevelopedtheAppleDesignAward-winningTwitterclientTweetiefortheMacandiPhone.Theapplication,nowcalled"Twitter"anddistributedfreeofcharge,istheofficialTwitterclientfortheiPhone,iPadandMac.[52] 2010–2014 FromSeptemberthroughOctober2010,thecompanybeganrollingout"NewTwitter",anentirelyrevampededitionoftwitter.com.ChangesincludedtheabilitytoseepicturesandvideoswithoutleavingTwitteritselfbyclickingonindividualtweetswhichcontainlinkstoimagesandclipsfromavarietyofsupportedwebsitesincludingYouTubeandFlickr,andacompleteoverhauloftheinterface,whichshiftedlinkssuchas'@mentions'and'Retweets'abovetheTwitterstream,while'Messages'and'LogOut'becameaccessibleviaablackbarattheverytopoftwitter.com.AsofNovember1,2010,thecompanyconfirmedthatthe"NewTwitterexperience"hadbeenrolledouttoallusers.In2019,Twitterwasannouncedtobethe10thmostdownloadedmobileappofthedecade,from2010to2019.[53] OnApril5,2011,Twittertestedanewhomepageandphasedoutthe"OldTwitter".[54]However,aglitchcameaboutafterthepagewaslaunched,sotheprevious"retro"homepagewasstillinuseuntiltheissueswereresolved;thenewhomepagewasreintroducedonApril20.[55][56]OnDecember8,2011,Twitteroverhauleditswebsiteoncemoretofeaturethe"Fly"design,whichtheservicesaysiseasierfornewuserstofollowandpromotesadvertising.InadditiontotheHometab,theConnectandDiscovertabswereintroducedalongwitharedesignedprofileandtimelineofTweets.Thesite'slayouthasbeencomparedtothatofFacebook.[57][58]OnFebruary21,2012,itwasannouncedthatTwitterandYandexagreedtoapartnership.Yandex,aRussiansearchengine,findsvaluewithinthepartnershipduetoTwitter'srealtimenewsfeeds.Twitter'sdirectorofbusinessdevelopmentexplainedthatitisimportanttohaveTwittercontentwhereTwitterusersgo.[59]OnMarch21,2012,Twittercelebrateditssixthbirthdaywhilealsoannouncingthatithad140 millionusersand340 milliontweetsperday.Thenumberofuserswasup40%fromtheirSeptember2011number,whichwassaidtohavebeenat100 millionatthetime.[60] InApril2012,TwitterannouncedthatitwasopeninganofficeinDetroit,withtheaimofworkingwithautomotivebrandsandadvertisingagencies.[61]TwitteralsoexpandeditsofficeinDublin.[62]OnJune5,2012,amodifiedlogowasunveiledthroughthecompanyblog,removingthetexttoshowcasetheslightlyredesignedbirdasthesolesymbolofTwitter.[63][64]OnOctober5,2012,TwitteracquiredavideoclipcompanycalledVinethatlaunchedinJanuary2013.[65][66]TwitterreleasedVineasastandaloneappthatallowsuserstocreateandsharesix-secondloopingvideoclipsonJanuary24,2013.VinevideossharedonTwitterarevisibledirectlyinusers'Twitterfeeds.[67]Duetoaninfluxofinappropriatecontent,itisnowrated17+inApple's[68]appstore.[69]OnDecember18,2012,Twitterannouncedithadsurpassed200 millionmonthlyactiveusers.Twitterhit100 millionmonthlyactiveusersinSeptember2011.[70] OnJanuary28,2013,TwitteracquiredCrashlyticsinordertobuildoutitsmobiledeveloperproducts.[71]OnApril18,2013,TwitterlaunchedamusicappcalledTwitterMusicfortheiPhone.[72]OnAugust28,2013,TwitteracquiredTrendrr,[73]followedbytheacquisitionofMoPubonSeptember9,2013.[74]AsofSeptember2013,thecompany'sdatashowedthat200 millionuserssentover400 milliontweetsdaily,withnearly60%oftweetssentfrommobiledevices.[75] DuringSuperBowlXLVIIonFebruary3,2013,thepowerwentoutintheMercedes-BenzSuperdomeMondelezInternationalvicepresidentLisaMannwasaskedtotweet,"Youcanstilldunkinthedark",referringtoOreocookies.Sheapproved,andasshetoldAdAgein2020,"literallytheworldchangedwhenIwokeupthenextmorning."Thisbecameamilestoneinthedevelopmentofcommentingdailyonculture.[76] 2014–2019 InApril2014,TwitterunderwentaredesignthatmadethesiteresembleFacebooksomewhat,withprofilepictureandbiographyinacolumnlefttothetimeline,andafull-widthheaderimagewithparallaxscrollingeffect.[a]ThatlayoutwasusedasmainforthedesktopfrontenduntilJuly2019,undergoingchangesovertimesuchasremovalofshortcutbuttonstojumptothepreviousornexttweetinearly2017,androundedprofilepicturessinceJune2017.[77][78][79] OnJune4,2014,TwitterannouncedthatitwouldacquireNamoMedia,atechnologyfirmspecializingin"nativeadvertising"formobiledevices.[80]OnJune19,2014,TwitterannouncedthatithadreachedanundiscloseddealtobuySnappyTV,aservicethathelpseditandsharevideofromtelevisionbroadcasts.[81][82]ThecompanywashelpingbroadcastersandrightsholderstosharevideocontentbothorganicallyacrosssocialandviaTwitter'sAmplifyprogram.[83]InJuly2014,TwitterannouncedthatitintendedtobuyayoungcompanycalledCardSpringforanundisclosedsum.CardSpringenabledretailerstoofferonlineshopperscouponsthattheycouldautomaticallysynctotheircreditcardsinordertoreceivediscountswhentheyshoppedinphysicalstores.[84]OnJuly31,2014,Twitterannouncedthatithadacquiredasmallpassword-securitystartupcalledMitro.[85]OnOctober29,2014,TwitterannouncedanewpartnershipwithIBM.ThepartnershipwasintendedtohelpbusinessesuseTwitterdatatounderstandtheircustomers,businessesandothertrends.[86] OnFebruary11,2015,TwitterannouncedthatithadacquiredNiche,anadvertisingnetworkforsocialmediastars,foundedbyRobFishmanandDarrenLachtman.[87]Theacquisitionpricewasreportedly$50 million.[88]OnMarch13,2015,TwitterannounceditsacquisitionofPeriscope,anappthatallowslivestreamingofvideo.[89]InApril2015,theTwitter.comdesktophomepagechanged.[90]TwitterannouncedthatithadacquiredTellApart,acommerceadstechfirm,with$532 millionstock.[91][92]Laterintheyearitbecameapparentthatgrowthhadslowed,accordingtoFortune,[93]BusinessInsider,[94]MarketingLand[95]andothernewswebsitesincludingQuartz(in2016).[96]InJune2016,TwitteracquiredanartificialintelligencestartupcalledMagicPonyfor$150 million.[97][98] SinceMay2018,tweetrepliesdeemedbyanartificialintelligencetobedetractivefromconversationareinitiallyhidden,andonlyloadedthroughactuatingaShowmorerepliesbuttonatthebottom.[99] 2019–present In2019,Twitterredesigneditsuserinterfaceyetagain.Thisnewest"newTwitter"wasdeployedin"agradualrollout".[100] OnJuly15,2019,TwitterendedsupportforTLS1.0and1.1connection.[101] InOctober2019,thetweethistoryoftheFortnitevideogame'saccountwasresurrectedafterappearingdeletedduringamarketingcampaign.Thisistheonlydocumentedoccurrenceofsuchresurrection.[102] Twittersawsomewhatdramaticgrowthin2020,possiblyduetotheCOVID-19pandemic.[103]Duringsaidpandemic,Twittersawanincreaseduseoftheplatformformisinformationrelatedtothepandemic.[104]TwitterannouncedinMarch2020thatitwouldstartmarkingtweetswhichmaycontainmisleadinginformation,insomecasesitwillprovidelinkstopagesoffact-checkinginformation.[105] AmajorhackofTwitteronJuly15,2020,affected130high-profileaccounts,bothverifiedandunverifiedonessuchasBarackObama,BillGates,andElonMusk;thehackallowedbitcoinscammerstosendtweetsviathecompromisedaccountsthataskedthefollowerstosendbitcointoagivenpublicaddress,withthepromisetodoubletheirmoney.[106]Withinafewhours,Twitterdisabledtweetingandresetpasswordsfromallverifiedaccounts.[106]AnalysisoftheeventrevealedthatthescammershadusedsocialengineeringtoobtaincredentialsfromTwitteremployeestoaccessanadministrationtoolusedbyTwittertoviewandchangetheseaccounts'personaldetailsastogainaccessaspartofa"smashandgrab"attempttomakemoneyquickly,withanestimatedUS$120,000inbitcoindepositedinvariousaccountsbeforeTwitterintervened.[107]SeverallawenforcemententitiesincludingtheFBIlaunchedinvestigationsintotheattacktodeterminetheperpetratorsoverconcernsofbroaderimplicationsofsuchahackinthefuture.[108] OnJune1,2020,Twitterdeactivatedthelegacydesktopfrontendoftheirwebsitethathadoriginallybeenintroducedin2014,[109][110]leavingtheprogressivewebappversionwhichwasoriginallyintroducedinApril2017as"TwitterLite"formobilephones[111]andusedbydefaultsinceJuly2019[112]astheonlyoption. InNovember2020,Twitterannouncedthatitwoulddevelopasocialaudiofeatureonitsplatform.[113]Later,InDecember2020,TwitterbeganbetatestingitssocialaudiofeatureknownasSpaceswithiOSusersontheirplatform.[114] Screencaptureof"M2MobileWeb"withintendaysbeforeshutdown "M2MobileWeb",theoriginalmobilewebfrontendofTwitter,laterservedasfallbacklegacyversiontoclientswithoutJavaScriptsupportandincompatiblebrowserssuchasgameconsoleswithlimitedwebbrowsingcapability.ItwasshutdowninDecember2020.[115] DuringtheGeorgeFloydprotestsandthroughthe2020election,misinformationspreadbyDonaldTrumpledtoTwitterexpandingapolicywheretheyaddeddisclaimerstomisinformation.[116][117]TwitterwasamongtheplatformsassociatedwiththestormingoftheUnitedStatesCapitolonJanuary6,2021.AccordingtotheAssociatedPress,"federallawenforcementauthoritiessaidthattherewasactivityonTwitter,butthattheyweren'texpectingthelevelofviolencetheyultimatelysawlastWednesday."[118]ThisledtoTrumpbeingsuspendedfromTwitterforglorifyingviolence,amongotherreasonssuchasfalseallegationsofelectionfraud.AccordingtoresearcherShannonMcGregor,"Twitter'spermanentsuspensionofTrump'sTwitteraccountislongoverdue."[119]However,amongconservativesandsomeEuropeanleaders,adegreeofcontroversyensuedoverthepowerheldbyaprivatecompanyoverspeech.[120]NathanAkehurstofJacobinMagazinesuggestedthat"TwitterprofitedfromDonaldTrump'sracistoutburstsforyears,onlytodeletehisaccountafewdaysbeforehisdeparture".[121] OnJanuary26,2021,TwitteracquiredRevue,anemailnewsletterservicetocompetewithplatformslikeSubstack.[122] OnFebruary25,2021,TwitterannouncedSuperFollows,asubscriptionserviceallowingcontentcreatorstoreceivepaymentsfortheircontent.[123][124] InMarch2021,TwitterstartedbetatestingSpacesforAndroidusers.[125]OnMarch5,itwasannouncedthatTwitterwasworkingonafeaturethatwouldofferusersashortwindowoftimetorethinkatweetaftertheyhitsend.TwitterconfirmedtoCNNthatitistestinganundooptionthatcouldpotentiallyletuserscorrectoreventoretractatweetbeforeitispostedonthesite.ThefeaturewasdiscoveredbyJaneManchunWong,anappdeveloperwhohasaproventrackrecordofuncoveringnewtoolsonsocialnetworksbeforetheyareofficiallyreleased.WongpostedaGIFontheplatformwhichshowablue"undo"barthatappearsunderthewords"YourTweetwassent."[126] In2021,Twitterisadvancinganopensourceinitiativethatcouldbeusedbyanysocialmediaplatformandwouldmakecontentmoderationmoretransparentwithamorerobustappealsprocess.CalledBluesky,theuseofsuchanopenprotocolwouldrelievecompaniesofthesoleresponsibilityforbeingcentralizedcuratorsofcontent.[127]TheTwitterresearchteamthatbeganworkonthiseffortwassetupinlate2019.[128] InApril2021,TwitterannouncedthatitwasestablishingitsAfricanheadquartersinGhana.[129][130] OnMay3,2021,TwitterSpacesreleasedglobally.[131][132] OnJune5,theNigeriangovernmentissuedanindefinitebanonTwitterusageinthecountryaftertheplatformremovedtweetsmadebytheNigerianPresidentMuhammaduBuhari.[133]Thecompanyclaimedthetweetsviolateditspoliciesagainst"abusivebehavior".Twittercalledtheban"deeplyconcerning".Severalhumanrightsorganizations,includingAmnestyInternational[134]andthelocalSocio-EconomicRightsandAccountabilityProject(SERAP),[135]spokeoutagainstthebanaswell.TheNigeriangovernmentstatedthatthebanwasnotbasedsolelyontheremovalofthetweetsandwasaresultof"alitanyofproblemswiththesocialmediaplatforminNigeria,wheremisinformationandfakenewsspreadthroughithavehadrealworldviolentconsequences".[136] InJune2021,TwitterannouncedthebetarolloutofitsSuperFollowsfeature.Agroupofuserswillbeallowedtochargefollowersmonthlyforaccesstoextracontent,notavailableintheirregularfeed.ThecompanyalsolaunchedtheTicketedSpacesprograminbeta,apremiumversionofitsaudioroomfeatureSpaces,whichmakesaccesstocertainaudioroomspaid.[137] TwitterrolledoutchangesintheinterfaceonAugust11,2021.Amongadjustmentsincoloruses,themajorchangewasconvertingtotheirnewChirpfont,designedtoallowleft-alignmentofmostWesternlanguagesastomakebrowsingoftweetseasiertofollow.[138] AnOctober21,2021,reportbasedona"long-running,massive-scalerandomizedexperiment"thatanalyzed"millionsoftweetssentbetween1Apriland15August2020",foundthatTwitter'smachinelearningalgorithmamplifiedright-leaningpoliticsonpersonalizeduserHometimelines.[139]: 1 [140]ThereportcomparedsevencountrieswithactiveTwitteruserswheredatawasavailable—Germany,Canada,theUnitedKingdom,Japan,France,andSpain—andexaminedTweets"frommajorpoliticalgroupsandpoliticians".[139]: 4 Researchersusedthe2019ChapelHillExpertSurvey(CHESDATA)topositionpartiesonpoliticalideologywithineachcountry.[139]: 4 The"machinelearningalgorithms"—introducedbyTwitterin2016—personalized99%ofusers'feedsbydisplayingTweets—evenolderTweetsandRetweetsfromaccountstheuserhadnotdirectlyfollowed—butthatthealgorithmhad"deemedrelevant"totheusers'pastpreferences.[139]: 4 Twitterrandomlychose1%ofuserswhoseHometimelinesdisplayedcontentinreverse-chronologicalorderfromuserstheydirectlyfollowed.[139]: 2  InJanuary2022,TwitterfinalizedthesaleofMoPubtoAppLovin.ThedealwasfirstannouncedinOctober2021,andthesellingpricewasreportedat$1.05billion.[141] Leadership Aschiefexecutiveofficer,Dorseysawthestartupthroughtworoundsofcapitalfundingbytheventurecapitalistswhobackedthecompany.[142]OnOctober16,2008,[143]WilliamstookovertheroleofCEO,andDorseybecamechairmanoftheboard.[144]OnOctober4,2010,WilliamsannouncedthathewassteppingdownasCEO.DickCostolo,formerlyTwitter'schiefoperatingofficer,becameCEO.OnOctober4,2010,Williamsmadeanannouncementsayingthathewillstaywiththecompanyand"becompletelyfocusedonproductstrategy".[145][146] AccordingtoTheNewYorkTimes,"Mr.DorseyandMr.Costoloforgedacloserelationship"whenWilliamswasaway.[147]AccordingtoPCMagazine,Williamswas"nolongerinvolvedintheday-to-daygoingsonatthecompany".Hewasfocusedondevelopinganewstartup,andbecameamemberofTwitter'sboardofdirectors,andpromisedto"helpinanyway[hecould]".In2011,StonewasstillwithTwitterbutwasworkingwithAOLasan"advisoronvolunteereffortsandphilanthropy".[148]InJanuary2014,StoneannouncedthereleaseofJelly,a'socialQ&Anetworkformobile'.[149]DorseyrejoinedTwitterinMarch2011,asexecutivechairmanfocusingonproductdevelopment.Atthattime,hesplithisschedulewithSquare(whereheisCEO),whoseofficesarewithinwalkingdistanceofTwitter'sinSanFrancisco.[147] InSeptember2011,boardmembersandinvestorsFredWilsonandBijanSabetresignedfromTwitter'sboardofdirectors.[150]InOctober2012,TwitterannouncedithadhiredformerGoogleexecutiveMattDerellatobecometheirnewdirectorofbusinessagencydevelopment.[151]TwitternamedformerGoldmanSachsexecutiveAnthonyNotoasthecompany'sCFOinJuly2014,withan"annualsalaryof$250,000andone-timerestrictedstockoptionsof1.5millionshares...valuedat$61.5million".[152]OnJune10,2015,TwitterannounceditsCEODickCostolowouldresignonJuly1,2015.[153]NotowassaidtobeconsideredapotentialreplacementforoutgoingCEOCostolo.[154]OnOctober14,2015,formerGooglechiefbusinessofficerOmidKordestanibecameexecutivechairman,replacingDorseywhoremainsCEO.[155]OnJanuary26,2016,LeslieBerland,formerexecutivevicepresidentofglobaladvertising,marketing,anddigitalpartnershipsatAmericanExpress,wasnamedchiefmarketingofficer.[156]InNovember2016,COOAdamBainannouncedhisresignationandCFOAnthonyNototookoverBain'srole.[157][158]Amonthlater,onDecember20,2016,CTOAdamMessingerannouncedthathetoowasleaving.[159][160] InFebruary2020,itwasreportedthatElliottManagementCorporationhadacquiredastakeinTwitter,withactivistshareholderandRepublicanPartysupporterPaulSingerexpectedtoseektheremovalofDorseyasCEO.[161]Twitteragreedtoappointanewindependentdirectorandtwonewboardmembers,andtoperform$2 billioninsharebuybacks.[162] OnNovember29,2021,JackDorseysteppeddownasCEO.HewasreplacedbyCTOParagAgrawal.[163][164] Listofchairmen JackDorsey(2008–2015) OmidKordestani(2015–2020) PatrickPichette(2020–2021) BretTaylor(2021-present) ListofCEOs JackDorsey(2006–2008);firstterm EvanWilliams(2008–2010) DickCostolo(2010–2015) JackDorsey(2015–2021);secondterm ParagAgrawal(2021–present) Appearanceandfeatures Mainarticle:ListofTwitterfeatures IthasbeensuggestedthatTwitterBluebemergedintothissection.(Discuss)ProposedsinceDecember2021. Tweets TheTwitteraccountpageforWikipedia,demonstratingtheaccount-customizedtimelineviewwhichshowstweetsinreversechronologicalorder Tweetsarepubliclyvisiblebydefault,butsenderscanrestrictmessagedeliverytoonlytheirfollowers.Userscanmuteuserstheydonotwishtointeractwith,blockaccountsfromviewingtheirtweetsandremoveaccountsfromtheirfollowerslist.[165][166][167]UserscantweetviatheTwitterwebsite,compatibleexternalapplications(suchasforsmartphones),orbyShortMessageService(SMS)availableincertaincountries.[168]Usersmaysubscribetootherusers'tweets—thisisknownas"following"andsubscribersareknownas"followers"[169]or"tweeps",aportmanteauofTwitterandpeeps.[170]Individualtweetscanbeforwardedbyotheruserstotheirownfeed,aprocessknownasa"retweet".In2015,Twitterlaunched"quotetweet"(originallycalled"retweetwithcomment"),[171]afeaturethatallowsuserstoaddacommenttotheirretweet,nestingonetweetintheother.[172]Userscanalso"like"(formerly"favorite")individualtweets.[173] Thecountersfor"likes","retweets",andrepliesappearnexttotherespectivebuttonsintimelinessuchasonprofilepagesandsearchresults.Countersforlikesandretweetsexistonatweet'sstandalonepagetoo.SinceSeptember2020,quotetweets,formerlyknownas"retweetwithcomment",haveanowncounterontheirtweetpage.[171]Untilthelegacydesktopfrontendthatwasdiscontinuedin2020,arowwithminiatureprofilepicturesofuptotenlikingorretweetinguserswasdisplayed(earliestdocumentedimplementationinDecember2011overhaul),aswellasatweetreplycounternexttotheaccordingbuttononatweet'spage.[174][175] Twitterallowsuserstoupdatetheirprofileviatheirmobilephoneeitherbytextmessagingorbyappsreleasedforcertainsmartphonesandtablets.[176]Twitterhasbeencomparedtoaweb-basedInternetRelayChat(IRC)client.[177]Ina2009Timemagazineessay,technologyauthorStevenJohnsondescribedthebasicmechanicsofTwitteras"remarkablysimple": Asasocialnetwork,Twitterrevolvesaroundtheprincipleoffollowers.WhenyouchoosetofollowanotherTwitteruser,thatuser'stweetsappearinreversechronologicalorderonyourmainTwitterpage.Ifyoufollow20people,you'llseeamixoftweetsscrollingdownthepage:breakfast-cerealupdates,interestingnewlinks,musicrecommendations,evenmusingsonthefutureofeducation.[178] AccordingtoresearchpublishedinApril2014,around44%ofuseraccountshavenevertweeted.[179] ThefirsttweetwaspostedbyJackDorsey(creator)at12:50PMPSTonMarch21,2006,andread"justsettingupmytwttr".[180]In2009,thefirsttweetwassentfromspace.USastronautsNicolaStottandJeffWilliamstookpartinalive'tweetup'fromtheInternationalSpaceStationwitharound35membersofthepublicattheNASAHeadquartersinWashington,D.C.[181] InMarch2021,JackDorseylistedhisfirsttweetforsale.Thehighestbidforthetweet,$2.5million,camefromaMalaysianbusinessman,SinaEstavi.Alongwiththemetadataoftheoriginaltweet,thebuyerwastoreceiveacertificatethatwasdigitallysignedandverifiedbyDorsey.[182] Content ContentoftweetsaccordingtoPearAnalytics  News(3.6%)  Spam(3.8%)  Self-promotion(5.9%)  Pointlessbabble(40.1%)  Conversational(37.6%)  Pass-alongvalue(8.7%) SanAntonio-basedmarket-researchfirmPearAnalyticsanalyzed2,000tweets(originatingfromtheUnitedStatesandinEnglish)overatwo-weekperiodinAugust2009from11:00amto5:00pm(CST)andseparatedthemintosixcategories.[183]Pointlessbabblemadeup40%,with38%beingconversational.Pass-alongvaluehad9%,self-promotion6%withspamandnewseachmaking4%. DespiteJackDorsey'sownopencontentionthatamessageonTwitteris"ashortburstofinconsequentialinformation",socialnetworkingresearcherdanahboydrespondedtothePearAnalyticssurveybyarguingthatwhatthePearresearcherslabeled"pointlessbabble"isbettercharacterizedas"socialgrooming"or"peripheralawareness"(whichshejustifiesaspersons"want[ing]toknowwhatthepeoplearoundthemarethinkinganddoingandfeeling,evenwhenco-presenceisn'tviable").[184]Similarly,asurveyofTwitterusersfoundthatamorespecificsocialroleofpassingalongmessagesthatincludeahyperlinkisanexpectationofreciprocallinkingbyfollowers.[185] Format Hashtags,usernames,retweetsandreplies "Twitterhashtag"redirectshere.Formoreabouthashtags,seeHashtag. Furtherinformation:Mention(blogging)§ @(Atsign) Userscangrouppoststogetherbytopicortypebyuseofhashtags–wordsorphrasesprefixedwitha"#"sign.Similarly,the"@"signfollowedbyausernameisusedformentioningorreplyingtootherusers.[186] In2014,inanticipationfortheFIFAWorldCup,Twitterintroducedhashflags,specialhashtagsthatautomaticallygenerateacustomemojinexttothemforacertainperiodoftime,followingthesuccessofasimilarcampaignduringthe2010WorldCup.[187]HashflagsmaybegeneratedbyTwitterthemselves(suchastoraiseawarenessforsocialissues)[188]orbepurchasedbycorporations(suchastopromoteproductsandevents).[189] TorepostamessagefromanotherTwitteruserandshareitwithone'sownfollowers,ausercanclicktheretweetbuttonwithintheTweet.Userscanreplyotheraccounts'replies.SinceNovember2019,userscanhiderepliestotheirmessages.SinceMay2020,userscanselectwhocanreplyeachoftheirtweetsbeforesendingthem:anyone,accountswhofollowtheposter,specificaccounts,andnone.ThisabilitywasupgradedinJuly2021tomakethefeatureretroactivelyapplicabletotweetsaftertheyhavebeensentout.[190][191] TwitterLists Inlate2009,the"TwitterLists"featurewasadded,makingitpossibleforuserstofollowadhoclistsofauthorsinsteadofindividualauthors.[169][192] UsingSMS ThroughSMS,userscancommunicatewithTwitterthroughfivegatewaynumbers:shortcodesfortheUnitedStates,Canada,India,NewZealand,andanIsleofMan-basednumberforinternationaluse.ThereisalsoashortcodeintheUnitedKingdomwhichisonlyaccessibletothoseontheVodafone,O2[193]andOrange[194]networks.InIndia,sinceTwitteronlysupportstweetsfromBhartiAirtel,[195]analternativeplatformcalledsmsTweet[196]wassetupbyausertoworkonallnetworks.[197]AsimilarplatformcalledGladlyCastexistsformobilephoneusersinSingaporeandMalaysia.[198] Thetweetsweresettoalargelyconstrictive140-characterlimitforcompatibilitywithSMSmessaging,introducingtheshorthandnotationandslangcommonlyusedinSMSmessages.The140-characterlimitalsoincreasedtheusageofURLshorteningservicessuchasbit.ly,goo.gl,tinyurl.com,tr.im,andothercontent-hostingservicessuchasTwitPic,memozu.comandNotePubtoaccommodatemultimediacontentandtextlongerthan140characters.SinceJune2011,Twitterhasuseditsownt.codomainforautomaticshorteningofallURLspostedonitssite,makingotherlinkshortenersunnecessaryforstayingwithinTwitter's140characterlimit.[199][200] InAugust2019,JackDorsey'saccountwashackedbyusingTwitter'sSMStotweetfeaturetosendcrudemessages.Dayslater,theabilitytosendatweetviaSMSwastemporarilyturnedoff.[201] InApril2020,TwitterdiscontinuedtheabilitytoreceiveSMSmessagescontainingthetextofnewtweetsinmostcountries.[202][203] Characterlimits In2016,Twitterannouncedthatmediasuchasphotos,videos,andtheperson'shandle,wouldnotcountagainstthealreadyconstrictive140characterlimit.AuserphotopostusedtocountforalargechunkofaTweet,about24characters.[204]Attachmentsandlinkswouldalsonolongerbepartofthecharacterlimit.[205] OnMarch29,2016,Twitterintroducedtheabilitytoaddacaptionofupto480characterstoeachimageattachedtoatweet.[206][207]ThiscaptioncanbeaccessedbyscreenreadingsoftwareorbyhoveringthemouseaboveapictureinsideTweetDeck. SinceMarch30,2017,theTwitterhandlesareoutsidethetweetitself,thereforetheynolongercounttowardsthecharacterlimit.[208]OnlynewTwitterhandlesaddedtotheconversationcounttowardsthelimit. In2017,Twitterdoubledtheirhistorical140-character-limitationto280.[209]Underthenewlimit,glyphsarecountedasavariablenumberofcharacters,dependinguponthescripttheyarefrom:mostEuropeanlettersandpunctuationformscountasonecharacter,whileeachCJKglyphcountsastwosothatonly140suchglyphscanbeusedinatweet.[209] URLshortener t.coisaURLshorteningservicecreatedbyTwitter.[199]ItisonlyavailableforlinkspostedtoTwitterandnotavailableforgeneraluse.[199]AlllinkspostedtoTwitteruseat.cowrapper.[210]Twitterhopesthattheservicewillbeabletoprotectusersfrommalicioussites,[199]andwilluseittotrackclicksonlinkswithintweets.[199][211] HavingusedtheservicesofthirdpartiesTinyURLandbit.ly,[212]TwitterbeganexperimentingwithitsownURLshorteningserviceforprivatemessagesinMarch2010usingthetwt.tldomain,[210]beforeitpurchasedthet.codomain.Theservicewastestedonthemainsiteusingtheaccounts@TwitterAPI,@rsarverand@raffi.[210]OnSeptember2,2010,anemailfromTwittertouserssaidtheywouldbeexpandingtheroll-outoftheservicetousers.OnJune7,2011,Twitterannouncedthatitwasrollingoutthefeature.[200] Trendingtopics Mainarticle:Twittertrends CountriesandcitieswithlocaltrendingtopicsinTwitter Aword,phrase,ortopicthatismentionedatagreaterratethanothersissaidtobea"trendingtopic".Trendingtopicsbecomepopulareitherthroughaconcertedeffortbyusersorbecauseofaneventthatpromptspeopletotalkaboutaspecifictopic.[213]ThesetopicshelpTwitterandtheiruserstounderstandwhatishappeningintheworldandwhatpeople'sopinionsareaboutit.[214] Trendingtopicsaresometimestheresultofconcertedeffortsandmanipulationsbyfansofcertaincelebritiesorculturalphenomena,particularlymusicianslikeLadyGaga(knownasLittleMonsters),JustinBieber(Beliebers),Rihanna(RihNavy)andOneDirection(Directioners),andnovelseriesTwilight(Twihards)andHarryPotter(Potterheads).Twitterhasalteredthetrendalgorithminthepasttopreventmanipulationofthistypewithlimitedsuccess.[215] TheTwitterwebinterfacedisplaysalistoftrendingtopicsonasidebaronthehomepage,alongwithsponsoredcontent(seeimage). Twitteroftencensorstrendinghashtagsthatareclaimedtobeabusiveoroffensive.Twittercensoredthe#Thatsafrican[216]and#thingsdarkiessayhashtagsafteruserscomplainedthattheyfoundthehashtagsoffensive.[217]ThereareallegationsthatTwitterremoved#NaMOinHydfromthetrendinglistandaddedanIndianNationalCongress-sponsoredhashtag.[218]PresidentDonaldTrumpprostetedtrendscallingthem"unfair,disgusting,illegal,ridiculous"claimingtheonesthatarebadabouthimareblownup.[219][220][221] Moments InOctober2015,Twitterintroduced"Moments"—afeaturethatallowsuserstocuratetweetsfromotherusersintoalargercollection.Twitterinitiallyintendedthefeaturetobeusedbyitsin-houseeditorialteamandotherpartners;theypopulatedadedicatedtabinTwitter'sapps,chroniclingnewsheadlines,sportingevents,andothercontent.[222][223]InSeptember2016,creationofmomentsbecameavailabletoallTwitterusers.[224] Addingandfollowingcontent Therearenumeroustoolsforaddingcontent,monitoringcontentandconversationsincludingTwitter'sownTweetDeck,Salesforce.com,HootSuite,andTwitterfeed.com.Asof2009[update],fewerthanhalfoftweetspostedwerepostedusingthewebuserinterfacewithmostusersusingthird-partyapplications(basedonananalysisof500 milliontweetsbySysomos).[225] Verifiedaccounts Mainarticle:Twitterverification TheofficialTwitterprofileofTwitter,Inc.Thebluecheckmarktotherightoftheprofilenameindicatesthatitisaverifiedaccount. InJune2009,afterbeingcriticizedbyKanyeWestandsuedbyTonyLaRussaoverunauthorizedaccountsrunbyimpersonators,thecompanylaunchedtheir"VerifiedAccounts"program.[226][227]Twitterstatedthatanaccountwitha"bluetick"verificationbadgeindicates"we'vebeenincontactwiththepersonorentitytheaccountisrepresentingandverifiedthatitisapproved".[228]InJuly2016,Twitterannouncedapublicapplicationprocesstograntverifiedstatustoanaccount"ifitisdeterminedtobeofpublicinterest"andthatverification"doesnotimplyanendorsement".[229][230][231]Verifiedstatusallowsaccesstosomefeaturesunavailabletootherusers,suchasonlyseeingmentionsfromotherverifiedaccounts.[232] InNovember2020,Twitterannouncedarelaunchofitsverificationsystemin2021.Accordingtothenewpolicy,Twitterverifiessixdifferenttypesofaccounts;forthreeofthem(companies,brands,andinfluentialindividualslikeactivists),theexistenceofaWikipediapagewillbeonecriterionforshowingthattheaccounthas"OffTwitterNotability".[233]Twitterstatesthatitwillre-openpublicverificationapplicationsatsomepointin"early2021".[234] Mobile ThemobileversionofTwitter[235] TwitterhasmobileappsforiPhone,iPad,Android,Windows10,WindowsPhone,BlackBerry,andNokiaS40.[236]UserscanalsotweetbysendingSMS.[237]InApril2017,TwitterintroducedTwitterLite,aprogressivewebappdesignedforregionswithunreliableandslowInternetconnections,withasizeoflessthanonemegabyte,designedfordeviceswithlimitedstoragecapacity.[238][239] ThishasbeenreleasedincountrieswithslowinternetconnectionsuchasthePhilippines.[240] TwitterLitehasevolvedintothemainTwitterwebinterface,seesection"interface".[citationneeded] Third-partyapplications Formanyyears,Twitterhaslimitedtheuseofthird-partyapplicationsaccessingtheservicebyimplementinga100,000userlimitperapplication.[241]SinceAugust2010,third-partyTwitterapplicationshavebeenrequiredtouseOAuth,anauthenticationmethodthatdoesnotrequireuserstoentertheirpasswordintotheauthenticatingapplication.Thiswasdonetoincreasesecurityandimprovetheuserexperience.[242] Relatedheadlinesfeature Thisfeatureaddswebsitestothebottomofatweet'spermalinkpage.Ifawebsiteembeddedatweetontooneoftheirstories,thetweetwillshowthewebsitesthatmentionedthetweet.ThisfeaturewasaddedontoTwittersoiftheviewerdoesnotunderstandwhatthetweetmeans,theycanclickonthesitestoreadmoreaboutwhatthepersonistalkingabout.[243] Polls In2015,Twitterbegantorollouttheabilitytoattachpollquestionstotweets.Pollsareopenforupto7days,andvotersarenotpersonallyidentified.[244] Initially,pollscouldhaveonlytwooptionswithamaximumoftwentycharactersperoption.Later[when?],theabilitytoaddfouroptionswithupto25charactersperoption,wasadded. Integratedphoto-sharingservice OnJune1,2011,Twitterannounceditsownintegratedphoto-sharingservicethatenablesuserstouploadaphotoandattachittoaTweetrightfromTwitter.com.[245]UsersnowalsohavetheabilitytoaddpicturestoTwitter'ssearchbyaddinghashtagstothetweet.[246]TwitteralsoplanstoprovidephotogalleriesdesignedtogatherandsyndicateallphotosthatauserhasuploadedonTwitterandthird-partyservicessuchasTwitPic.[246] Streamingvideo In2016,Twitterbegantoplacealargerfocusonlivestreamingvideoprogramming,hostingvariouseventsincludingstreamsoftheRepublicanandDemocraticconventionsduringtheU.S.presidentialcampaignaspartofapartnershipwithCBSNews,[247]DreamhackandESLeSportsevents,[248]andwinningabidfornon-exclusivestreamingrightstotenNFLThursdayNightFootballgamesinthe2016season.[248][249] DuringaneventinNewYorkinMay2017,Twitterannouncedthatitplannedtoconstructa24-hourstreamingvideochannelhostedwithintheservice,featuringcontentfromvariouspartners.[248][250]CEOJackDorseystatedthatthedigitalvideostrategywaspartofagoalforTwittertobe"thefirstplacethatanyonehearsofanythinggoingonthatmatterstothem";asofthefirstquarterof2017,Twitterhadover200contentpartners,whostreamedover800hoursofvideoover450events.[251] Twitterannouncedanumberofnewandexpandedpartnershipsforitsstreamingvideoservicesattheevent,includingBloomberg,BuzzFeed,Cheddar(OpeningBellandClosingBellshows;thelatterwasintroducedinOctober2016)IMGFashion(coverageoffashionevents),LiveNationEntertainment(streamingconcertevents),MajorLeagueBaseball(weeklyonlinegamestream,plusaweeklyprogramwithlivelook-insandcoverageoftrendingstories),MTVandBET(redcarpetcoveragefortheirMTVVideoMusicAwards,MTVMovie&TVAwards,andBETAwards),NFLNetwork(theMonday-ThursdaynewsprogramNFLBlitzLive,andSundayFantasyGameday),[252][253]thePGATour(PGATourLivecoverageofearlytournamentroundsprecedingtelevisioncoverage),[254]ThePlayers'Tribune,BenSilvermanandHowardT.Owens'Propagate(dailyentertainmentshow#WhatsHappening),TheVerge(weeklytechnologyshowCircuitBreaker:TheVerge'sGadgetShow),Stadium(anewdigitalsportsnetworkbeingformedbySilverChaliceandSinclairBroadcastGroup)[255][256][257]andtheWNBA(weeklygame).[251] Accountarchival Twitterhasofferedtwodifferentmethods[clarify]ofarchivingone'sownTwitteraccountdata.Thosemethodshavetheirindividualbenefitsanddisadvantages.AsofSeptember2019,onlythelatterarchivalmethodisavailable.[citationneeded] BrowsablelegacyTwitterarchiveformat InDecember2012,Twitterintroduceda"Tweetarchival"feature,whichcreatedaZIPfilethatcontainsanoffline-browsablearchiveofalltweets.[258]Thoseexportedtweetscouldbebrowsedandsearchedofflinebyusingthebundleduser-interfaceaccessiblethroughanInternetbrowser,whichusedclient-side,JavaScript-poweredpagination.[259]TheuserinterfaceofthetweetarchivebrowserhadadesignsimilartoTwitter's2010–2014desktopuserinterface,evenuntilthefeature'sremoval.Thetweettextcontents,ID's,timedataandsourcelabelsarelocatedinthefilecalled"tweets.csv".Itwaspossibletorequestatleastonearchiveperday[verificationneeded].Theabilitytoexportthistypeoftweetarchive,whichneverexistedonthenewlayout,hasbeenremovedentirelyinAugust2019[whenexactly?],afterco-existingwiththenew2018dataarchivalmethod. EvenwhenaccessingthelegacyTwitterdesktopwebsitelayoutusingtheuser-agentofanolderbrowserversion,theoptionhasdisappearedfromtheaccountsettings. Spaces TwitterSpacesisasocialaudiofeaturethatenablesuserstohostorparticipateinalive-audiovirtualenvironmentcalledspaceforconversation.Spacescanaccommodateanunlimitednumberoflisteners.Amaximumof13people(1host,2co-hostsand10speakers)areallowedonstage.Thefeaturewasinitiallylimitedtouserswithatleast600followers.SinceOctober21,2021,anyTwitterusercancreateaSpacefromtheAndroidoriOSapp.[260] Fleets InMarch2020,Twitterbegantotestastoriesfeatureknownas"fleets"insomemarkets,[261][262]whichofficiallylaunchedonNovember17,2020.[263][264]Similarlytoequivalentfeatures,fleetscancontaintextandmedia,areonlyaccessiblefor24hoursaftertheyareposted,andareaccessedwithintheTwitterappviaanareaabovethetimeline.[261] InJune2021,Twitterannounceditwouldstartimplementingadvertisingintofleets,integratingfull-screenadsamonguser-createdcontent.[265]OnJuly14,2021,TwitterstatedthatitwouldremoveFleetsbyAugust3.Twitterhadintendedforfleetstoencouragemoreuserstotweetregularly,ratherthansimplyconsumeotherfolks'tweets,butinsteadfleetsweregenerallyusedbyuserswhoalreadytweetedalot.ThecompanystatedthattheirspotatthetopofthescreenwouldnowbeoccupiedbycurrentlyactiveSpacesfromtheuser'sfeed.[266] TwitterBlue OnJune3,2021,TwitterannouncedaserviceknownasTwitterBlue,whichprovidesfeaturesexclusivetothosewhoaresubscriberstotheTwitterBlueservice.Theyinclude: UndoTweet,whichallowsuserstowithdrawatweetwithinashorttimeframebeforeitisposted.[267] Bookmarks,whichallowsuserstosaveindividualtweetsintofolders.[267] Readermode,whichconvertsthreadsoftweetsintoanarticle-likeview.[267] AselectionofcolorthemesandappiconsfortheTwittermobileapp.[267] Dedicatedcustomersupport.[267] NFTprofilepictures,addedonJanuary20,2022.[268] TheservicewasinitiallyreleasedinAustraliaandCanada.[267]OnNovember9,2021,TwitterBluewaslaunchedforUScustomers.[269] TipJar InMay2021,TwitterbegantestingaTipJarfeatureonitsiOSandAndroidclients.Thefeatureallowsuserstosendmonetarytipstocertainaccounts,providingafinancialincentiveforcontentcreatorsontheplatform.TheTipJarisoptionalanduserscanchoosewhetherornottoenabletipsfortheiraccount.Thedaythefeaturewaslaunched,auserdiscoveredthatsendingatipthroughPayPalwouldrevealthesender'saddresstotherecipient.[270] OnSeptember23,2021,Twitterannouncedthatitwillallowuserstotipusersonthesocialnetworkwithbitcoin.ThefeaturewillbeavailableforiOSusers.Previously,userscouldtipwithfiatcurrencyusingservicessuchasSquare'sCashappandPayPal'sVenmo.TwitterwillintegratetheStrikebitcoinlightningwalletservice.Itwasnotedthatatthiscurrenttime,Twitterwillnottakeacutofanymoneysentthroughthetipsfeature.[271] TheShopModule InJuly2021,TwitterlaunchedatestofTheShopModule,ashoppingextensionthatdirectscustomerstoabrand'sproductsfromitsofficialTwitteraccount.ThefeatureinitiallylaunchedforUS-basedusersonlyandonlyoniOS.[272] SafetyMode OnSeptember1,2021,TwitterbegantorolloutSafetyMode,allowinguserstoreducedisruptiveinteractions.Therolloutbeganwithasmallbeta-feedbackgrouponiOS,Android,andTwitter'swebapplication.[273] Thefunctionalityallowsuserstotemporarilyblockaccountsforsevendayswhenpotentiallyharmfullanguageisdetected.IfauserhasSafetyModeenabled,authorsoftweetsthatareidentifiedbyTwitter'stechnologyasbeingharmfulorexercisinguninvitedbehaviorwillbetemporarilyunabletofollowtheaccount,senddirectmessages,orseetweetsfromtheuserwiththeenabledfunctionalityduringthetemporaryblockperiod.JarrodDoherty,seniorproductmanageratTwitter,statedthatthetechnologyinplacewithinSafetymodeassessesexistingrelationshipstopreventblockingaccountsthattheuserfrequentlyinteractswith. TwitterfirstrevealedSafetyModeinFebruary2021withintheAnalystDayslidedeck.[274] LiveShopping OnNovember22,2021,Twitterannouncedliveshopping[275]featureonitsplatform.WalmartwillbethefirstretailertotestTwitter’snewlivestreamshoppingplatform.[276]Thecompanystatedthatitispartoftheircontinuingeffortstobringengagingexperiencestocustomersthatallowthemtoshopseamlesslywhilealsobeingentertained. Shops Twitterallowcompaniestoshowcaseupto50productsforsaleontheirprofiles,aspartofnewfeaturetesting.ShopswillhelpTwittertogainapieceofthe$45billionUSmarketforsocialcommerce.[277] Usage Mainarticle:Twitterusage Dailyuserestimatesvaryasthecompanydoesnotpublishstatisticsonactiveaccounts.AFebruary2009Compete.comblogentryrankedTwitterasthethirdmostusedsocialnetworkbasedontheircountof6 millionuniquemonthlyvisitorsand55 millionmonthlyvisits.[43]In2009,Twitterhadamonthlyuserretentionrateoffortypercent.[278]Twitterhadannualgrowthof1,382percent,increasingfrom475,000uniquevisitorsinFebruary2008to7 millioninFebruary2009.Twitter'sannualgrowthratedecreasedfrom7.8percentin2015to3.4percentin2017.[279]AnApril2017astatista.comblogentryrankedTwitterasthetenthmostusedsocialnetworkbasedontheircountof319 millionmonthlyvisitors.[280]Itsglobaluserbasein2017was328 million.[281]AsperAugust2018,Twitterlight(datasavingapp)isavailablein45countries.[282] Demographics Thissectionneedstobeupdated.Pleasehelpupdatethisarticletoreflectrecenteventsornewlyavailableinformation.(September2019) Seealso:BlackTwitter Twitter.comTop5GlobalMarketsbyReach(%)[283][284] Country Fraction Indonesia Jun. 2010    20.8% Dec. 2010    19.0% Brazil Jun. 2010    20.5% Dec. 2010    21.8% Venezuela Jun. 2010    19.0% Dec. 2010    21.1% Netherlands Jun. 2010    17.7% Dec. 2010    22.3% Japan Jun. 2010    16.8% Dec. 2010    20.0% Note:Visitorage>15,homeandworklocations.ExcludesvisitationfrompubliccomputerssuchasInternetcafesoraccessfrommobilephonesorPDAs. In2009,TwitterwasmainlyusedbyolderadultswhomightnothaveusedothersocialsitesbeforeTwitter,saidJeremiahOwyang,anindustryanalyststudyingsocialmedia."Adultsarejustcatchinguptowhatteenshavebeendoingforyears",hesaid.[285]AccordingtocomScoreonly11%ofTwitter'susersareaged12to17.[285]comScoreattributedthistoTwitter's"earlyadopterperiod"whenthesocialnetworkfirstgainedpopularityinbusinesssettingsandnewsoutletsattractingprimarilyolderusers.However,comScorealsostatedin2009thatTwitterhadbegunto"filtermoreintothemainstream",and"alongwithitcameacultureofcelebrityasShaq,BritneySpearsandAshtonKutcherjoinedtheranksoftheTwitterati".[286] AccordingtoastudybySysomosinJune2009,womenmakeupaslightlylargerTwitterdemographicthanmen—53%over47%.Italsostatedthat5%ofusersaccountedfor75%ofallactivityandthatNewYorkCityhasmoreTwitterusersthanothercities.[287] AccordingtoQuancast,27millionpeopleintheUSusedTwitterasofSeptember3,2009;63%ofTwitterusersareunder35yearsold;60%ofTwitterusersareCaucasian,butahigherthanaverage(comparedtootherInternetproperties)areAfricanAmerican/black(16%)andHispanic(11%);58%ofTwitterusershaveatotalhouseholdincomeofatleastUS$60,000.[288]TheprevalenceofAfricanAmericanTwitterusageandinmanypopularhashtagshasbeenthesubjectofresearchstudies.[289][290] OnSeptember7,2011,Twitterannouncedthatithad100 millionactiveuserslogginginatleastonceamonthand50 millionactiveuserseveryday.[291] In2012,thecountrywiththemostactiveusersonTwitterwastheUnitedStates.[292]A2016PewresearchpollfoundthatTwitterisusedby24%ofallonlineUSadults.Itwasequallypopularwithmenandwomen(24%and25%ofonlineAmericansrespectively),butmorepopularwithyounger(36%of18–29yearolds)generations.[293] InanarticlepublishedonJanuary6,2012,TwitterwasconfirmedtobethebiggestsocialmedianetworkinJapan,withFacebookfollowingcloselyinsecond.ComScoreconfirmedthis,statingthatJapanwastheonlycountryintheworldwhereTwitterleadsFacebook.[294] OnMarch31,2014,Twitterannouncedthattherewere255 millionmonthlyactiveusers(MAUs)and198 millionmobileMAUs.[295]In2013,therewereover100 millionusersactivelyusingTwitterdailyandabout500 millionTweetseveryday,[296]withabout29%ofuserscheckingTwittermultipletimesaday.[297] AsofQ12019[update],Twitterhadmorethan330millionmonthlyactiveusers.ThemajorityofTwitterusersskewtotheAmericanpoliticalleft.[298][299][11] A2019surveyconductedbythePewFoundationfoundthatTwitterusersaremorelikelythanthegeneralpublictohavebothacollegedegreeandhigherincomethantheaverageU.S.adult.Usersarealsothreetimesaslikelytobeyoungerthan50yearsold,withthemedianageofadultU.S.usersbeing40yearsold.Thesurveyfoundthat10%ofuserswhoaremostactiveonTwitterareresponsiblefor80%ofalltweets,focusingmainlyonthetopicsofpoliticsandwomen.[300] Levelsofuse About22%ofAmericanssaytheyhaveeverusedTwitter,accordingtoa2019PewResearchCentersurvey.[301]NotinghowdemographicsofTwitterusersdifferfromtheaverageAmericans,commentatorshavecautionedagainstmedianarrativesthattreatTwitterasrepresentativeofthepopulation,[302]addingthatonly10%ofusersTweetactively,andthat90%ofTwitterusershaveTweetednomorethantwice.In2016,shareholderssuedTwitter,allegingit"artificiallyinflateditsstockpricebymisleadingthemaboutuserengagement."ThecompanyannouncedonSeptember20,2021,thatitwouldpay$809.5milliontosettlethisclass-actionlawsuit.[303] Branding TheTwitterlogofromSeptember14,2010,toJune5,2012,featuringthesilhouetteversionof"LarrytheBird" Twitterhasbecomeinternationallyidentifiablebyitssignaturebirdlogo,ortheTwitterBird.Theoriginallogo,whichwassimplythewordTwitter,wasinusefromitslaunchinMarch2006.ItwasaccompaniedbyanimageofabirdwhichwaslaterdiscoveredtobeapieceofclipartcreatedbytheBritishgraphicdesignerSimonOxley.[304]AnewlogohadtoberedesignedbyfounderBizStonewithhelpfromdesignerPhilipPascuzzo,whichresultedinamorecartoon-likebirdin2009.Thisversionhadbeennamed"LarrytheBird"afterLarryBirdoftheNBA'sBostonCelticsfame.[304][305] Withinayear,theLarrytheBirdlogounderwentaredesignbyStoneandPascuzzotoeliminatethecartoonfeatures,leavingasolidsilhouetteofLarrytheBirdthatwasusedfrom2010through2012.[304]In2012,DouglasBowmancreatedafurthersimplifiedversionofLarrytheBird,keepingthesolidsilhouettebutmakingitmoresimilartoamountainbluebird.[306]Thisnewlogowascalledsimplythe"TwitterBird"andhasbeenusedasthecompany'sbrandingsince.[304][307] Finances Forthefiscalyear2017,TwitterreportedlossesofUS$108 million,withanannualrevenueof$2.443 billion,adecreaseof3.9%overthepreviousfiscalcycle.Twitter'ssharestradedatover$17pershare,anditsmarketcapitalizationwasvaluedatoverUS$25.6 billioninOctober2018. Year Revenueinmil.US$ Netincomeinmil.US$ Totalassetsinmil.US$ Employees 2010[308] 28 −67 0 N/A 2011[308] 106 −164 721 N/A 2012[308] 317 −79 832 2,000 2013[308] 665 −645 3,366 2,712 2014[309] 1,403 −578 5,583 3,638 2015[310] 2,218 −521 6,442 3,898 2016[311] 2,530 −457 6,870 3,583 2017[312] 2,443 −108 7,412 3,372 2018[313] 3,042 1,206 10,163 3,900 2019[314] 3,459 1,466 12,703 4,900 2020[3] 3,716 1,136 13,379 Over5,500 Funding Twitter'sSanFranciscoheadquarterslocatedat1355MarketStreet TwitterraisedoverUS$57 millionfromventurecapitalistgrowthfunding,althoughexactfiguresarenotpubliclydisclosed.Twitter'sfirstAroundoffundingwasforanundisclosedamountthatisrumoredtohavebeenbetweenUS$1 millionandUS$5 million.[315]ItssecondBroundoffundingin2008wasforUS$22 million[316]anditsthirdCroundoffundingin2009wasforUS$35 millionfromInstitutionalVenturePartnersandBenchmarkCapitalalongwithanundisclosedamountfromotherinvestorsincludingUnionSquareVentures,SparkCapital,andInsightVenturePartners.[315]TwitterisbackedbyUnionSquareVentures,DigitalGarage,SparkCapital,andBezosExpeditions.[142] InMay2008,TheIndustryStandardremarkedthatTwitter'slong-termviabilityislimitedbyalackofrevenue.[317]TwitterboardmemberToddChaffeeforecastthatthecompanycouldprofitfrome-commerce,notingthatusersmaywanttobuyitemsdirectlyfromTwittersinceitalreadyprovidesproductrecommendationsandpromotions.[318] ByMarch2009,communicationsconsultantBillDouglasspredictedinaninterviewthatTwitterwouldbeworth$1 billionwithinsixmonths,[319]whichcametopasswhenthecompanyclosedafinancingroundvaluingitat$1 billioninSeptemberofthatyear.[320] ThecompanyraisedUS$200 millioninnewventurecapitalinDecember2010,atavaluationofapproximatelyUS$3.7 billion.[321]InMarch2011,35,000TwittersharessoldforUS$34.50eachonSharespost,animpliedvaluationofUS$7.8 billion.[322]InAugust2010Twitterannounceda"significant"investmentledbyDigitalSkyTechnologiesthat,atUS$800 million,wasreportedtobethelargestventureroundinhistory.[323] InDecember2011,theSaudiprinceAlwaleedbinTalalinvestedUS$300 millioninTwitter.ThecompanywasvaluedatUS$8.4 billionatthetime.[324]In2016,TwitterwasvaluedbyForbesatUS$15.7 billion.[325] Revenuesources InJuly2009,someofTwitter'srevenueandusergrowthdocumentswerepublishedonTechCrunchafterbeingillegallyobtainedbyHackerCroll.Thedocumentsprojected2009revenuesofUS$400,000inthethirdquarterandUS$4 millioninthefourthquarteralongwith25 millionusersbytheendoftheyear.Theprojectionsfortheendof2013wereUS$1.54 billioninrevenue,US$111 millioninnetearnings,andonebillionusers.[326]NoinformationabouthowTwitterplannedtoachievethosenumberswaspublished.Inresponse,Twitterco-founderBizStonepublishedablogpostsuggestingthepossibilityoflegalactionagainstthehacker.[327] OnApril13,2010,Twitterannouncedplanstoofferpaidadvertisingforcompaniesthatwouldbeabletopurchase"promotedtweets"toappearinselectivesearchresultsontheTwitterwebsite,similartoGoogleAdwords'advertisingmodel.AsofApril13,Twitterannouncedithadalreadysignedupanumberofcompanieswishingtoadvertise,includingSonyPictures,RedBull,BestBuy,andStarbucks.[328][329] ThecompanygeneratedUS$45 millioninannualrevenuein2010,afterbeginningsalesmidwaythroughthatyear;thecompanyoperatedatalossthroughmostof2010.[321] Users'photoscangenerateroyalty-freerevenueforTwitter,andanagreementwithWorldEntertainmentNewsNetwork(WENN)wasannouncedinMay2011.[330]InJune2011,Twitterannouncedthatitwouldoffersmallbusinessesaself-serviceadvertisingsystem.[331]TwittergeneratedUS$139.5 millioninadvertisingsalesduring2011. Theself-serviceadvertisingplatformwaslaunchedinMarch2012toAmericanExpresscardmembersandmerchantsintheU.S.onaninvite-onlybasis.Twitterlaterreportedthatnumeroussmallbusinessesandpeoplewhousedtheself-servicetoolprovidedfeedbackthatindicatedtheywereimpressedbythefeature.[332]Tocontinuetheiradvertisingcampaign,TwitterannouncedonMarch20,2012,thatpromotedtweetswouldbeintroducedtomobiledevices.[333]InApril2013,TwitterannouncedthatitsTwitterAdsself-serviceplatform,consistingofpromotedtweetsandpromotedaccounts,wasavailabletoallU.S.userswithoutaninvite.[332] Twitter'sfinancialrevenuestatisticsforthefirstquarterof2014wasreportedasUS$250 million.[295] OnAugust3,2016,TwitterlaunchedInstantUnlockCard,anewfeaturethatencouragespeopletotweetaboutabrandinordertoearnrewardsandutilizethesocialmedianetwork'sconversationalads.Theformatitselfconsistsofimagesorvideoswithcall-to-actionbuttonsandacustomizablehashtag.[334] Stocklaunchandtaxissues Twitter'sSanFranciscoheadquarters,asseenfromacorneronMarketStreet OnSeptember12,2013,TwitterannouncedthatithadfiledpaperswiththeU.S.SecuritiesandExchangeCommission(SEC)aheadofaplannedstockmarketlisting.[335]Itrevealeditsprospectusinan800-pagefiling.[336]TwitterplannedtoraiseUS$1billionasthebasisforitsstockmarketdebut.[337]Theinitialpublicoffering(IPO)filingstatesthat"200,000,000+monthlyactiveusers"accessTwitterand"500,000,000+tweetsperday"areposted.[34][338]InanOctober15,2013,amendmenttotheirSECS-1filing,[339]TwitterdeclaredthattheywouldlistontheNewYorkStockExchange(NYSE),quashingspeculationthattheirstockwouldtradeontheNASDAQexchange.ThisdecisionwaswidelyviewedtobeareactiontothebotchedinitialpublicofferingofFacebook.[340]OnNovember6,2013,70 millionshares[341]werepricedatUS$26andissuedbyleadunderwriterGoldmanSachs.[342] OnNovember7,2013,thefirstdayoftradingontheNYSE,Twittersharesopenedat$26.00andclosedatUS$44.90,givingthecompanyavaluationofaroundUS$31 billion.[343]Consequently,executivesandearlyinvestorsmarginallyincreasedtheircapital,includingco-foundersWilliamsandDorseywhoreceivedasumofUS$2.56 billionandUS$1.05 billionrespectively,whileCostolo'spaymentwasUS$345 million.[344]OnFebruary5,2014,Twitterpublisheditsfirstresultsasapubliccompany,showinganetlossof$511 millioninthefourthquarterof2013.[345]OnJanuary5,2016,CEOJackDorseycommentedonareportthatTwitterplannedtoexpanditscharacterlimitto10,000(privatemessagesalreadyhadthelongerlimitasofJuly),requiringuserstoclicktoseeanythingbeyond140characters.HesaidwhileTwitterwould"neverlosethatfeeling"ofspeed,userscoulddomorewiththetext.[346] InSeptember2016,Twittersharesrose20%afterareportthatithadreceivedtakeoverapproaches.[347]PotentialbuyerswereAlphabet(theparentcompanyofGoogle),[347]Microsoft,[348][349][350]Salesforce.com,[347][351]Verizon,[351]andTheWaltDisneyCompany.[352][353]Twitter'sboardofdirectorswereopentoadeal,whichcouldhavecomebytheendof2016.[347][354]However,nodealwasmade,withreportsinOctoberstatingthatallthepotentialbuyersdroppedoutpartlyduetoconcernsoverabuseandharassmentontheservice.[355][356][357]InJune2017,Twitterrevampeditsdashboardtoimprovethenewuserexperience.[358][359] InNovember2017,theParadisePapers,asetofconfidentialelectronicdocumentsrelatingtooffshoreinvestment,revealedthatTwitterisamongthecorporationsthatavoidedpayingtaxesbyusingoffshorecompanies.[360]LaterTheNewYorkTimesreportedthatRussian-AmericanbillionaireYuriMilnerhadstrongKremlinbackingforhisinvestmentsinFacebookandTwitter.[361] Contributions Inthe2018USelectioncycle,96.15%($295,722)ofdonationsof$200ormorefromTwitteremployeestowardthecategoryof"allfederalcandidates"wenttoDemocrats,versus3.85%($11,850)toRepublicans.[362] Advertisingbans InOctober2017,TwitterbannedtheRussianmediaoutletsRTandSputnikfromadvertisingontheirwebsitefollowingtheconclusionsoftheU.S.nationalintelligencereportthepreviousJanuarythatbothSputnikandRThadbeenusedasvehiclesforRussia'sinterferenceinthe2016USpresidentialelection.[363]MariaZakharovafortheRussianforeignministrysaidthebanwasa"grossviolation"bytheUSoffreespeech.[364] InOctober2019,TwitterannounceditwouldstoprunningpoliticaladsonitsadplatformeffectiveNovember22.Thisresultedfromseveralspuriousclaimsmadebypoliticalads.CompanyCEODorseyclarifiedthatinternetadvertisinghadgreatpowerandwasextremelyeffectiveforcommercialadvertisers,thepowerbringssignificantriskstopoliticswherecrucialdecisionsimpactmillionsoflives.[365] Usermonetization InJune2021,thecompanyopenedapplicationsforitspremiumsubscriptionoptionscalledSuperFollows.Thisletseligibleaccountscharge$2.99,$4.99or$9.99permonthtosubscribetotheaccount.[366]Thelaunchonlygeneratedabout$6,000initsfirsttwoweeks.[367] OnAugust27,2021,TwitterrolledoutTicketedSpaces,whichletTwitterSpaceshostschargebetween$1and$999foraccesstotheirrooms.[368] Technology Implementation Twitterplacesgreatrelianceonopen-sourcesoftware.[369]TheTwitterWebinterfaceusestheRubyonRailsframework,[370]deployedonaperformanceenhancedRubyEnterpriseEditionimplementationofRuby.[371] IntheearlydaysofTwitter,tweetswerestoredinMySQLdatabasesthatweretemporallysharded(largedatabasesweresplitbasedontimeofposting).Afterthehugevolumeoftweetscomingincausedproblemsreadingfromandwritingtothesedatabases,thecompanydecidedthatthesystemneededre-engineering.[48] FromSpring2007to2008,themessageswerehandledbyaRubypersistentqueueservercalledStarling.[372]Since2009,implementationhasbeengraduallyreplacedwithsoftwarewritteninScala.[373]TheswitchfromRubytoScalaandtheJVMhasgivenTwitteraperformanceboostfrom200–300requestspersecondperhosttoaround10,000–20,000requestspersecondperhost.Thisboostwasgreaterthanthe10ximprovementthatTwitter'sengineersenvisionedwhenstartingtheswitch.ThecontinueddevelopmentofTwitterhasalsoinvolvedaswitchfrommonolithicdevelopmentofasingleapptoanarchitecturewheredifferentservicesarebuiltindependentlyandjoinedthroughremoteprocedurecalls.[48] AsofApril6,2011,TwitterengineersconfirmedthattheyhadswitchedawayfromtheirRubyonRailssearchstacktoaJavaservertheycallBlender.[9] IndividualtweetsareregisteredunderuniqueIDscalledsnowflakes,andgeolocationdataisaddedusing'Rockdove'.TheURLshortenert.cothenchecksforaspamlinkandshortenstheURL.Next,thetweetsarestoredinaMySQLdatabaseusingGizzard,andtheuserreceivesanacknowledgementthatthetweetsweresent.TweetsarethensenttosearchenginesviatheFirehoseAPI.TheprocessismanagedbyFlockDBandtakesanaverageof350ms.[369] OnAugust16,2013,RaffiKrikorian,Twitter'svicepresidentofplatformengineering,sharedinablogpostthatthecompany'sinfrastructurehandledalmost143,000tweetspersecondduringthatweek,settinganewrecord.KrikorianexplainedthatTwitterachievedthisrecordbyblendingitshomegrownandopensourcetechnologies.[48][374] Theservice'sapplicationprogramminginterface(API)allowsotherwebservicesandapplicationstointegratewithTwitter.[375] Interface TwitterintroducedthefirstmajorredesignofitsuserinterfaceinSeptember2010,adoptingadual-panelayoutwithanavigationbaralongthetopofthescreen,andanincreasedfocusontheinlineembeddingofmultimediacontent.Criticsconsideredtheredesignanattempttoemulatefeaturesandexperiencesfoundinmobileappsandthird-partyTwitterclients.[376][377][378][379] Thenewlayoutwasrevisedin2011withafocusoncontinuitywiththewebandmobileversions,introducing"Connect"(interactionswithotheruserssuchasreplies)and"Discover"(furtherinformationregardingtrendingtopicsandnewsheadlines)tabs,anupdatedprofiledesign,andmovingallcontenttotherightpane(leavingtheleftpanededicatedtofunctionsandthetrendingtopicslist).[380]InMarch2012,TwitterbecameavailableinArabic,Farsi,HebrewandUrdu,thefirstright-to-leftlanguageversionsofthesite.About13,000volunteershelpedwithtranslatingthemenuoptions.[381]InAugust2012,betasupportforBasque,CzechandGreekwasadded,makingthesiteavailablein33differentlanguages.[382] InSeptember2012,anewlayoutforprofileswasintroduced,withlarger"covers"thatcouldbecustomizedwithacustomheaderimage,andadisplayoftheuser'srecentphotosposted.[383]The"Discover"tabwasdiscontinuedinApril2015,[384]andwassucceededonthemobileappbyan"Explore"tab—whichfeaturestrendingtopicsandmoments.[385] InSeptember2018,Twitterbegantomigrateselectedwebuserstoitsprogressivewebapp(basedonitsTwitterLiteexperienceformobileweb),reducingtheinterfacetotwocolumns.MigrationstothisiterationofTwitterincreasedinApril2019,withsomeusersreceivingitwithamodifiedlayout.[386][387] InJuly2019,Twitterofficiallyreleasedthisredesign,withnofurtheroptiontoopt-outwhileloggedin.Itisdesignedtofurther-unifyTwitter'suserexperiencebetweenthewebandmobileapplicationversions,adoptingathree-columnlayoutwithasidebarcontaininglinkstocommonareas(including"Explore"thathasbeenmergedwiththesearchpage)whichpreviouslyappearedinahorizontaltopbar,profileelementssuchaspictureandheaderimagesandbiographytextsmergedintothesamecolumnasthetimeline,andfeaturesfromthemobileversion(suchasmulti-accountsupport,andanopt-outforthe"toptweets"modeonthetimeline).[388][389] Outages TheTwitterfailwhaleerrormessage Duringanoutage,Twitteruserswereatonetimeshownthe"failwhale"errormessageimagecreatedbyYiyingLu,[390]illustratingeightorangebirdsusinganettohoistawhalefromtheoceancaptioned"Toomanytweets!Pleasewaitamomentandtryagain."[391]WebdesignerandTwitteruserJenSimmonswasthefirsttocointheterm"failwhale"inaSeptember2007tweet.[392][393]InaNovember2013WIREDinterviewChrisFry,VPofEngineeringatthattime,notedthatthecompanyhadtakenthe"failwhale"outofproductionastheplatformwasnowmorestable.[394] Twitterhadapproximatelyninety-eightpercentuptimein2007(oraboutsixfulldaysofdowntime).[395]Thedowntimewasparticularlynoticeableduringeventspopularwiththetechnologyindustrysuchasthe2008MacworldConference&Expokeynoteaddress.[396][397] Useraccounts Privacy,securityandharassment Twittermessagesarepublic,butuserscanalsosendprivate"directmessages".[398]Informationaboutwhohaschosentofollowanaccountandwhoauserhaschosentofollowisalsopublic,thoughaccountscanbechangedto"protected"whichlimitsthisinformation(andalltweets)toapprovedfollowers.[399]Twittercollectspersonallyidentifiableinformationaboutitsusersandsharesitwiththirdpartiesasspecifiedinitsprivacypolicy.Theservicealsoreservestherighttosellthisinformationasanassetifthecompanychangeshands.[400]WhileTwitterdisplaysnoadvertising,advertiserscantargetusersbasedontheirhistoryoftweetsandmayquotetweetsinads[401]directedspecificallytotheuser. AsecurityvulnerabilitywasreportedonApril7,2007,byNiteshDhanjaniandRujith.SinceTwitterusedthephonenumberofthesenderofanSMSmessageasauthentication,malicioususerscouldupdatesomeoneelse'sstatuspagebyusingSMSspoofing.[402]Thevulnerabilitycouldbeusedifthespooferknewthephonenumberregisteredtotheirvictim'saccount.Withinafewweeksofthisdiscovery,Twitterintroducedanoptionalpersonalidentificationnumber(PIN)thatitsuserscouldusetoauthenticatetheirSMS-originatingmessages.[403] OnJanuary5,2009,33 high-profileTwitteraccountswerecompromisedafteraTwitteradministrator'spasswordwasguessedbyadictionaryattack.[404]Someofthecompromisedaccountssentfalsifiedtweets,includingdrug-relatedmessages.[405] Twitterlaunchedthebetaversionoftheir"VerifiedAccounts"serviceonJune11,2009,allowingpeoplewithpublicprofilestoannouncetheiraccountname.Thehomepagesoftheseaccountsdisplayabadgeindicatingtheirstatus.[406] InMay2010,abugwasdiscoveredbyİnciSözlükthatcouldallowaTwitterusertoforceotherstofollowthemwithouttheotherusers'consentorknowledge.Forexample,comedianConanO'Brien'saccount,whichhadbeensettofollowonlyoneperson,waschangedtoreceivenearly200malicioussubscriptions.[407] InresponsetoTwitter'ssecuritybreaches,theUnitedStatesFederalTradeCommission(FTC)broughtchargesagainsttheservice;thechargesweresettledonJune24,2010.ThiswasthefirsttimetheFTChadtakenactionagainstasocialnetworkforsecuritylapses.ThesettlementrequiresTwittertotakeanumberofstepstosecureusers'privateinformation,includingmaintenanceofa"comprehensiveinformationsecurityprogram"tobeindependentlyauditedbiannually.[408] OnDecember14,2010,theUnitedStatesDepartmentofJusticeissuedasubpoenadirectingTwittertoprovideinformationforaccountsregisteredtoorassociatedwithWikiLeaks.[409]Twitterdecidedtonotifyitsusersandsaidinastatement,"...it'sourpolicytonotifyusersaboutlawenforcementandgovernmentalrequestsfortheirinformation,unlesswearepreventedbylawfromdoingso."[398] A"MouseOver"exploitoccurredonSeptember21,2010,whenanXSSWormbecameactiveonTwitter.Whenauserheldthemousecursoroverblacked-outpartsofatweet,thewormwithinthescriptwouldautomaticallyopenlinksandre-postitselfonthereader'saccount.[410]Theexploitwasthenre-usedtopostpop-upadsandlinkstopornographicsites.Theoriginofthewormisunclear,butPearceH.Delphin(knownonTwitteras@zzap)andaScandinaviandeveloper,MagnusHolm,bothclaimtohavemodifiedarelatedexploitfoundbyanotheruser(possiblyMasatoKinugawa)whowasusingittocreatecoloredTweets.[411]Kinugawa,aJapanesedeveloper,reportedtheXSSvulnerabilitytoTwitteronAugust14.Later,whenhefounditwasexploitableagain,hecreatedtheaccount'RainbowTwtr'andusedittopostcoloredmessages.[411]DelphinsaysheexposedthesecurityflawbytweetingaJavaScriptfunctionfor"onMouseOver",[411]andHolmlatercreatedandpostedtheXSSWormthatautomaticallyre-tweeteditself.[410]SecurityfirmSophosreportedthattheviruswasspreadbypeopledoingitfor"funandgames",butnoteditcouldbeexploitedbycybercriminals.[410]Twitterissuedastatementontheirstatusblogat13:50UTCthat"Theexploitisfullypatched."[410][412]TwitterrepresentativeCarolynPennersaidnochargeswouldbepressed.[413] InMay2011,aclaimantknownas"CTB"inthecaseofCTBvTwitterInc.tookactionagainstTwitterattheHighCourtofJusticeofEnglandandWales,[414]requestingthatthecompanyreleasedetailsofaccountholders.ThisfollowedgossippostedonTwitteraboutprofessionalfootballerRyanGiggs'sprivatelife.Thisledtothe2011Britishprivacyinjunctionscontroversyandthe"super-injunction".[415]TonyWang,theheadofTwitterinEurope,saidthatpeoplewhodo"badthings"onthesitewouldneedtodefendthemselvesunderthelawsoftheirownjurisdictionintheeventofcontroversyandthatthesitewouldhandoverinformationaboutuserstotheauthoritieswhenitwaslegallyrequiredtodoso.[416]HealsosuggestedthatTwitterwouldaccedetoaUKcourtordertodivulgenamesofusersresponsiblefor"illegalactivity"onthesite.[417] TwitteracquiredDasient,astartupthatoffersmalwareprotectionforbusinesses,inJanuary2012.TwitterannouncedplanstouseDasienttohelpremovehatefuladvertisersonthewebsite.[418]Twitteralsoofferedafeaturewhichwouldallowtweetstoberemovedselectivelybycountry,beforedeletedtweetsusedtoberemovedinallcountries.[419][420]ThefirstuseofthepolicywastoblocktheaccountofGermanneo-NazigroupBesseresHannoveronOctober18,2012.[421]Thepolicywasusedagainthefollowingdaytoremoveanti-SemiticFrenchtweetswiththehashtag#unbonjuif("agoodJew").[422]InFebruary2012,athird-partypublic-keyencryptionapp(writteninPythonandpartiallyfundedbyagrantfromtheShuttleworthFoundation[423])forprivatemessaginginTwitter,CrypTweet,wasreleased.[424]AmonthlaterTwitterannounceditwouldimplementthe"DoNotTrack"privacyoption,acookie-blockingfeaturefoundinMozilla'sFirefoxbrowser.The"DoNotTrack"featureworksonlyonsitesthathaveagreedtotheservice.[425] InAugust2012,itwasreportedthattherewasamarketinfakeTwitterfollowersusedtoincreasepoliticians'andcelebrities'apparentpopularity.[426]Theblackmarketforthefakefollowers,knownas"bots",hasbeenlinkedto"nearlyeverypoliticallylinkedaccountfromtheWhiteHousetoCongresstothe2016campaigntrail".InJune2014,PoliticoanalyzedTwitterhandleswiththehighestratesoffakefollowers:U.S.PresidentBarackObamawith46.8percent,DemocraticNationalCommitteeChairwomanDebbieWassermanSchultzwith35.1percent,andSenatorJohnMcCainwith23.6percent.Theculpritsworkingtogeneratethefakefollowers,or"bots",includedcampaignworkersorfriendsofpoliticalcandidates.Onesiteoffered1,000fakefollowersfor$20.Thepeoplecreatingthe"bots"wereoftenfromEasternEuropeandAsia.[427][428]In2013,twoItalianresearcherscalculated10percentoftotalaccountsonTwitterwere"bots"althoughotherestimateshaveplacedthefigureevenhigher.[429] Afteranumberofhigh-profilehacksofofficialaccounts,includingthoseoftheAssociatedPressandTheGuardian,[430]inApril2013,Twitterannouncedatwo-factorloginverificationasanaddedmeasureagainsthacking.[431]InAugust2013,Twitterannouncedplanstointroducea"reportabuse"buttonforallversionsofthesitefollowinguproar,includingapetitionwith100,000signatures,overTweetsthatincludedrapeanddeaththreatstohistorianMaryBeard,feministcampaignerCarolineCriado-PerezandthememberofparliamentStellaCreasy.[432][433][434]FollowedthesharingofimagesshowingthekillingofAmericanjournalistJamesFoleyin2014,Twittersaidthatincertaincasesitwoulddeletepicturesofpeoplewhohaddiedafterrequestsfromfamilymembersand"authorizedindividuals".[435][436] TwitterannouncednewreportingandblockingpoliciesinDecember2014,[437][438][439][440]includingablockingmechanismdevisedbyRandiHarper,atargetofGamerGate.[441][442][443]InFebruary2015,CEODickCostolosaidhewas'franklyashamed'athowpoorlyTwitterhandledtrollingandabuse,andadmittedTwitterhadlostusersasaresult.[444] In2015,followingupdatedtermsofserviceandprivacypolicy,TwitterusersoutsidetheUnitedStateswerelegallyservedbytheIreland-basedTwitterInternationalCompanyinsteadofTwitter,Inc.ThechangemadetheseuserssubjecttoIrishandEuropeanUniondataprotectionlaws[445] In2016,TwitterannouncedthecreationoftheTwitterTrust&SafetyCounciltohelp"ensurethatpeoplefeelsafeexpressingthemselvesonTwitter."Thecouncil'sinauguralmembersincluded50organizationsandindividuals.[446] OnMay5,2018,Twittersentoutanupdate/mailtoeverycustomerregardingabugthatstoredpasswordsunmaskedinaninternallog.Accordingtothemtheinvestigationshowednoindicationsofbreachormisusebutrecommendedeveryonetochangetheirpasswordanyway.[447] OnMay13,2019,TwitterdisclosedthattheyhaddiscoveredabugthataccidentallysharedlocationdatafromiOSdevicestoanadvertiser.Theyassuredthatthedatawasnotretainedandthatthebugwasfixed.[448][449][450] OnDecember20,2019,TwitterfixedasecurityvulnerabilityinitsAndroidappthatcouldallowahackertotakeoverauser'saccountandsendtweetsordirectmessagesaswellasseeprivateaccountinfo.[451][452] The2020DemocraticpresidentialcandidateBernieSandershasfacedcriticismforthebehaviorofsomeofhissupportersonlinebuthasdeflectedsuchcriticism,suggestingthat"Russians"wereimpersonatingpeopleclaimingtobe"BernieBro"supporters.[453]TwitterrejectedSanders'suggestionthatRussiacouldberesponsibleforthebadreputationofhissupporters.ATwitterspokespersontoldCNBC:"Usingtechnologyandhumanreviewinconcert,weproactivelymonitorTwittertoidentifyattemptsatplatformmanipulationandmitigatethem.Asisstandard,ifwehavereasonableevidenceofstate-backedinformationoperations,we'lldisclosethemfollowingourthoroughinvestigationtoourpublicarchive—thelargestofitskindintheindustry."[454] OnApril8,2020,TwitterannouncedthatusersoutsideoftheEuropeanEconomicAreaorUnitedKingdom(thussubjecttoGDPR)willnolongerbeallowedtooptoutofsharing"mobileappadvertisingmeasurements"toTwitterthird-partypartners.[455] OnOctober9,2020,Twittertookadditionalstepstocountermisleadingcampaignsaheadofthe2020USElection.Twitter'snewtemporaryupdateencouragedusersto"addtheirowncommentary"beforeretweetingatweet,bymaking'quotingtweet'amandatoryfeatureinsteadofoptional.Thesocialnetworkgiantaimedatgeneratingcontextandencouragingthecirculationofmorethoughtfulcontent.[456]Afterlimitedresults,thecompanyendedthisexperimentinDecember2020.[457] Suspectandcontestedaccounts Seealso:DeplatformingandTwittersuspensions InJanuary2016,TwitterwassuedbythewidowofaU.S.mankilledinthe2015Ammanshootingattack,claimingthatallowingtheIslamicStateofIraqandtheLevant(ISIL)tocontinuallyusetheplatform,includingdirectmessagesinparticular,[458]constitutedtheprovisionofmaterialsupporttoaterroristorganization,whichisillegalunderU.S.federallaw.Twitterdisputedtheclaim,statingthat"violentthreatsandthepromotionofterrorismdeservenoplaceonTwitterand,likeothersocialnetworks,ourrulesmakethatclear."[459][460]ThelawsuitwasdismissedbytheUnitedStatesDistrictCourtfortheNorthernDistrictofCalifornia,upholdingtheSection230safeharbor,whichdictatesthattheoperatorsofaninteractivecomputerservicearenotliableforthecontentpublishedbyitsusers.[460][461]ThelawsuitwasrevisedinAugust2016,providingcomparisonstoothertelecommunicationsdevices.[458] TwittersuspendedmultipleparodyaccountsthatsatirizedRussianpoliticsinMay2016,sparkingprotestsandraisingquestionsaboutwherethecompanystandsonfreedomofspeech.[462]Followingpublicoutcry,Twitterrestoredtheaccountsthenextdaywithoutexplainingwhytheaccountshadbeensuspended.[463]Thesameday,Twitter,alongwithFacebook,Google,andMicrosoft,jointlyagreedtoaEuropeanUnioncodeofconductobligatingthemtoreview"[the]majorityofvalidnotificationsforremovalofillegalhatespeech"postedontheirserviceswithin24hours.[464]InAugust2016,Twitterstatedthatithadbanned235,000accountsoverthepastsixmonths,bringingtheoverallnumberofsuspendedaccountsto360,000accountsinthepastyear,forviolatingpoliciesbanninguseoftheplatformtopromoteextremism.[465] OnMay10,2019,Twitterannouncedthattheysuspended166,513accountsforpromotingterrorismintheJuly–December2018period,statingtherewasasteadydecreaseinterroristgroupstryingtousetheplatformowingtoits"zero-tolerancepolicyenforcement".AccordingtoVijayaGadde,Legal,PolicyandTrustandSafetyLeadatTwitter,therewasareductionof19%terrorrelatedtweetsfromthepreviousreportingperiod(January–June2018).[466][467][468][469][470] Similarly,Twitterbanned7,000accountsandlimited150,000morethathadtiestoQAnononJuly21,2020.ThebansandlimitscameafterQAnon-relatedaccountsbeganharassingotherusersthroughpracticesofswarmingorbrigading,coordinatedattacksontheseindividualsthroughmultipleaccountsintheweeksprior.ThoseaccountslimitedbyTwitterwillnotappearinsearchesnorbepromotedinotherTwitterfunctions.Twittersaidtheywillcontinuetobanorlimitaccountsasnecessary,withtheirsupportaccountstating"WewillpermanentlysuspendaccountsTweetingaboutthesetopicsthatweknowareengagedinviolationsofourmulti-accountpolicy,coordinatingabusearoundindividualvictims,orareattemptingtoevadeaprevioussuspension".[471] AsofJuly30,2020,TwitterwillblockURLsintweetsthatpointtoexternalwebsitesthatcontainmaliciouscontent(suchasmalwareandphishingcontent)aswellorhatespeech,speechencouragingviolence,terrorism,childsexualexploitation,breachesofprivacy,andothersimilarcontentthatisalreadybannedaspartofthecontentoftweetsonthesite.Usersthatfrequentlypointtosuchsitesmayhavetheiraccountssuspended.Twittersaidthiswastobringtheirpolicyinlinetopreventusersfrombypassingtheirtweetcontentrestrictionsbysimplylinkingtothebannedcontent.[472] FollowingtheonsetofprotestsbyDonaldTrump'ssupportersacrosstheUSinJanuary2021,Twittersuspendedmorethan70,000accounts,statingthattheyshared"harmfulQAnon-associatedcontent"atalargescale,andwere"dedicatedtothepropagationofthisconspiracytheoryacrosstheservice".TheriotersthatbrokeintoUSCapitolHillincludedalargeamountofQAnonfollowers.[473] Maliciousandfakeaccounts BetweenJanuaryandlateJuly2017,Twitterhadidentifiedandshutdownover7,000fakeaccountscreatedbyIranianinfluenceoperations.[474] InMay2018,inresponsetoscrutinyoverthemisuseofTwitterbythoseseekingtomaliciouslyinfluenceelections,TwitterannouncedthatitwouldpartnerwiththenonprofitorganizationBallotpediatoaddspeciallabelsverifyingtheauthenticityofpoliticalcandidatesrunningforelectionintheU.S.[475][476] InDecember2019,Twitterremoved5,929accountsforviolatingtheirmanipulationpolicies.Thecompanyinvestigatedandattributedtheseaccountstoasinglestate-runinformationoperation,whichoriginatedinSaudiArabia.Theaccountswerereportedtobeapartofalargergroupof88,000accountsengagedinspammybehavior.However,Twitterdidnotdiscloseallofthemassomecouldpossiblybelegitimateaccountstakenoverthroughhacking.[477] InMarch2021,Twittersuspendedaround3,500fakeaccountsthatwererunningacampaigntoinfluencetheAmericanaudience,aftertheUSintelligenceofficialsconcludedthattheassassinationofTheWashingtonPostjournalist,JamalKhashoggiwas"approved"bytheSaudiCrownPrinceMohammedbinSalman.TheseSaudiaccountswereworkingintwolanguages,EnglishandArabic,toinfluencepublicopinionaroundtheissue.ManyaccountscommenteddirectlyonthetweetsofUS-basedmediahouses,includingThePost,CNN,CBSNewsandTheLosAngelesTimes.Twitterwasunabletoidentifythesourceoftheinfluencecampaign.[478] Twitterbots Mainarticle:Twitterbot ATwitterbotisacomputerprogramthatautomaticallypostsonTwitter.Theyareprogrammedtotweet,retweet,andfollowotheraccounts.Accordingtoarecentreport,therewere20 million,fewerthan5%,ofaccountsonTwitterthatwerefraudulentin2013.Thesefakeaccountsareoftenusedtobuildlargefollowerpopulationsquicklyforadvertisers,whileothersrespondtotweetsthatincludeacertainwordorphrase.[479]Twitter'swide-openapplicationprogramminginterfaceandcloudserversmakeitpossiblefortwitterbots'existencewithinthesocialnetworkingsite.[480] Effects Twitterbotsarecapableofinfluencingpublicopinionaboutculture,products,andpoliticalagendasbyautomaticallygeneratingmassamountsoftweetsthroughimitatinghumancommunication.[481]TheNewYorkTimesstates,"Theyhavesleep-wakecyclessotheirfakeryismoreconvincing,makingthemlesspronetorepetitivepatternsthatflagthemasmereprograms."[482]Thetweetsgeneratedvaryanywherefromasimpleautomatedresponsetocontentcreationandinformationsharing,allofwhichdependsontheintentionofthepersonpurchasingorcreatingthebot.ThesocialimplicationstheseTwitterbotspotentiallyhaveonhumanperceptionaresizeableaccordingtoastudypublishedbytheScienceDirectJournal.LookingattheComputersasSocialActors(CASA)paradigm,thejournalnotes,"peopleexhibitremarkablesocialreactionstocomputersandothermedia,treatingthemasiftheywererealpeopleorrealplaces."ThestudyconcludedthatTwitterbotswereviewedascredibleandcompetentincommunicationandinteractionmakingthemsuitablefortransmittinginformationinthesocialmediasphere.[483]WhiletechnologicaladvanceshaveenabledtheabilityofsuccessfulHuman-ComputerInteraction,theimplicationsarequestionedduetotheappearanceofbothbenignandmaliciousbotsintheTwitterrealm.BenignTwitterbotsmaygeneratecreativecontentandrelevantproductupdateswhereasmaliciousbotscanmakeunpopularpeopleseempopular,pushirrelevantproductsonusersandspreadmisinformation,spamorslander.[484] Inadditiontocontent-generatingbots,userscanpurchasefollowers,favorites,retweets,andcommentsonvariouswebsitesthatcatertoexpandingauser'simagethroughtheaccumulationoffollowers.Withmorefollowers,users'profilesgainmoreattention,thusincreasingtheirpopularity.[485]GeneratingWebtrafficisavaluablecommodityforbothindividualsandbusinessesbecauseitindicatesnotability.[486]WithTwitterbots,usersareabletocreatetheillusionof"buzz"ontheirsitebyobtainingfollowersfromservicessuchasSwenzyandundergroundsupplierswhooperatebotfarmsorclickfarms.[481][486]ThecompaniesthatfacilitatethisservicecreatefakeTwitteraccountsthatfollowanumberofpeople,someoftheseTwitteraccountsmayevenpostfaketweetstomakeitseemliketheyarereal.ThispracticeofobtainingmassamountsoftwitterbotsasfollowersisnotpermittedonTwitter.[487]Theemphasisonfollowersandlikesasameasureofsocialcapitalhasurgedpeopletoextendtheircircletoweakandlatenttiestopromotetheideaofpopularityforcelebrities,politicians,musicians,publicfigures,andcompaniesalike.[488]AccordingtoTheNewYorkTimes,botsamasssignificantinfluenceandhavebeennotedtoswayelections,influencethestockmarket,publicappeal,andattackgovernments.[489] Developers TwitterisrecognizedforhavingoneofthemostopenandpowerfuldeveloperAPIsofanymajortechnologycompany.[490]DeveloperinterestinTwitterbeganimmediatelyfollowingitslaunch,promptingthecompanytoreleasethefirstversionofitspublicAPIinSeptember2006.[491]TheAPIquicklybecameiconicasareferenceimplementationforpublicRESTAPIsandiswidelycitedinprogrammingtutorials.[492] From2006until2010,Twitter'sdeveloperplatformexperiencedstronggrowthandahighlyfavorablereputation.DevelopersbuiltuponthepublicAPItocreatethefirstTwittermobilephoneclientsaswellasthefirstURLshortener.Between2010and2012,however,Twittermadeanumberofdecisionsthatwerereceivedunfavorablybythedevelopercommunity.[493]In2010,TwittermandatedthatalldevelopersadoptOAuthauthenticationwithjust9weeksofnotice.[494]Laterthatyear,TwitterlauncheditsownURLshortener,indirectcompetitionwithsomeofitsmostwell-known3rd-partydevelopers.[495]Andin2012,TwitterintroducedstrictusagelimitsforitsAPI,"completelycrippling"somedevelopers.[496]Whilethesemovessuccessfullyincreasedthestabilityandsecurityoftheservice,theywerebroadlyperceivedashostiletodevelopers,causingthemtolosetrustintheplatform.[497] Inanefforttoresetitsrelationshipwithdevelopers,TwitteracquiredCrashlyticsonJanuary28,2013,foroverUS$100 million,itslargestacquisitiontodate.[71]Twittercommittedtocontinuesupportingandexpandingtheservice.[498] InOctober2014,TwitterannouncedFabric,asuiteofmobiledevelopertoolsbuiltaroundCrashlytics.[499]FabricbroughttogetherCrashlytics,Answers(mobileappanalytics),Beta(mobileappdistribution),Digits(mobileappidentityandauthenticationservices),MoPub,andTwitterKit(loginwithTwitterandTweetdisplayfunctionality)intoasingle,modularSDK,allowingdeveloperstopickandchoosewhichfeaturestheyneededwhileguaranteeingeaseofinstallationandcompatibility.BybuildingFabricontopofCrashlytics,TwitterwasabletotakeadvantageofCrashlytics'largeadoptionanddevicefootprinttorapidlyscaleusageofMoPubandTwitterKit.Fabricreachedactivedistributionacross1 billionmobiledevicesjust8monthsafteritslaunch.[500] Inearly2016,TwitterannouncedthatFabricwasinstalledonmorethan2 billionactivedevicesandusedbymorethan225,000developers.Fabricisrecognizedasthe#1mostpopularcrashreportingandalsothe#1mobileanalyticssolutionamongthetop200iOSapps,beatingoutGoogleAnalytics,Flurry,andMixPanel.[501][502] Innovatorspatentagreement OnApril17,2012,Twitterannounceditwouldimplementan"InnovatorsPatentAgreement"whichwouldobligateTwittertoonlyuseitspatentsfordefensivepurposes[clarify].Theagreementwentintoeffectin2012.[503] Opensource Twitterhasahistoryofbothusingandreleasingopen-sourcesoftwarewhileovercomingtechnicalchallengesoftheirservice.[504]Apageintheirdeveloperdocumentationthanksdozensofopen-sourceprojectswhichtheyhaveused,fromrevisioncontrolsoftwarelikeGittoprogramminglanguagessuchasRubyandScala.[505]SoftwarereleasedasopensourcebythecompanyincludestheGizzardScalaframeworkforcreatingdistributeddatastores,thedistributedgraphdatabaseFlockDB,theFinaglelibraryforbuildingasynchronousRPCserversandclients,theTwUIuserinterfaceframeworkforiOS,andtheBowerclient-sidepackagemanager.[506]ThepopularBootstrapfrontendframeworkwasalsostartedatTwitterandis10thmostpopularrepositoryonGitHub.[507] Society Dorsey(left)saidafteraTwitterTownHallwithBarackObamaheldinJuly2011,thatTwitterreceivedover110,000#AskObamatweets.[508] Mainarticle:Twitterusage Usage Protesters Twitterhasbeenusedforavarietyofpurposesinmanyindustriesandscenarios.Forexample,ithasbeenusedtoorganizeprotests,sometimesreferredtoas"TwitterRevolutions",[509]whichincludetheprotestsoverthe2009Moldovanelection,the2009studentprotestsinAustria,the2009Gaza–Israelconflict,the2009Iraniangreenrevolution,the2010TorontoG20protests,the2010BolivarianRevolution,the2010Stuttgart21protestsinGermany,the2011EgyptianRevolution,2011Englandriots,the2011UnitedStatesOccupymovement,the2011anti-austeritymovementinSpain,the2011AganaktismenoimovementsinGreece,the2011demonstrationinRome,the2011Wisconsinlaborprotests,the2012Gaza–Israelconflict,the2013protestsinBrazil,andthe2013GeziParkprotestsinTurkey.[510]AresultoftheIranianelectionprotestssawthegovernmentofIranblockTwitterincensorship.[511] Theserviceisalsousedasaformofcivildisobedience:In2010,usersexpressedoutrageovertheTwitterJokeTrialbycopyingacontroversialjokeaboutbombinganairportandattachingthehashtag#IAmSpartacus,areferencetothefilmSpartacus(1960)andasignofsolidarityandsupporttoamancontroversiallyprosecutedafterpostingatweetjokingaboutbombinganairportiftheycanceledhisflight.#IAmSpartacusbecamethenumberonetrendingtopiconTwitterworldwide.[512]Anothercaseofcivildisobediencehappenedinthe2011Britishprivacyinjunctiondebate,whereseveralcelebritieswhohadtakenoutanonymizedinjunctionswereidentifiedbythousandsofusersinprotesttotraditionaljournalismbeingcensored.[513] DuringtheArabSpringinearly2011,thenumberofhashtagsmentioningtheuprisingsinTunisiaandEgyptincreased.[514]AstudybytheDubaiSchoolofGovernmentfoundthatonly0.26%oftheEgyptianpopulation,0.1%oftheTunisianpopulationand0.04%oftheSyrianpopulationareactiveonTwitter.[515] Governments AccordingtodocumentsleakedbyEdwardSnowdenandpublishedinJuly2014,theUnitedKingdom'sGCHQhasatoolnamedBIRDSONGfor"automatedpostingofTwitterupdates",andatoolnamedBIRDSTRIKEfor"Twittermonitoringandprofilecollection".[516][517] Duringthe2019–20HongKongprotests,Twittersuspendedacoregroupof1,000"fake"accountsandanassociatednetworkof200,000accountsforoperatingadisinformationcampaignthatwaslinkedtotheChinesegovernment.Intheirannouncement,Twitterreleasedtwodatasetsdetailingthecoregroup'saccountactivity.[518][519][520]GengShuang,thespokespersonoftheChineseMinistryofForeignAffairs,didnotcommentonthesuspensionsbutsuggestedthattheactivitycouldbeattributedtooverseasChinesecitizens.[521][522] OnJune12,2020,Twittersuspendedover7,000accountsfromTurkeybecausethoseaccountswerefakeprofiles,designedtosupporttheTurkishpresidentandweremanagedbyacentralauthority.Turkey'scommunicationdirectorsaidthatthedecisionwasillogical,biasedandpoliticallymotivated.[523] InMay2021,TwitterlabeledoneofthetweetsbySambitPatra,aspokesmanofthelocalrulingpartyBJPinIndia,as"manipulatedmedia",leadingtoTwitter'sofficesinDelhiandGurgaonbeingraidedbythelocalpolice.[524]Twitterissuedastatement,callingthepolicevisit"aformofintimidation".[525]Later,theIndiangovernmentreleasedastatementinJuly2021claimingTwitterhaslostitsliabilityprotectionconcerninguser-generatedcontent.ThiswasbroughtonbyTwitter'sfailuretocomplywiththenewITrulesintroducedin2021withafilingstatingthatthecompanyfailedtoappointexecutivestogovernusercontentontheplatform.[526]TwitterstatedtoIndia'sgovernmentinAugust2021thattheyhaveappointedpermanentexecutivesandstafftoprovideforcompliancetothesenewITrules.[527] Far-rightcontent Postsontheserviceoftencontainfar-rightcontent,suchashatespeechandconspiracytheoriessuchasQAnon.[528]Journalists[which?]havecriticizedTwitterforhatespeechbeingeasytofindontheplatform.[529] Impact Instant,short,andfrequentcommunication InMay2008,TheWallStreetJournalwrotethatsocialnetworkingservicessuchasTwitter"elicitmixedfeelingsinthetechnology-savvypeoplewhohavebeentheirearlyadopters.Fanssaytheyareagoodwaytokeepintouchwithbusyfriends.Butsomeusersarestartingtofeeltooconnected,astheygrapplewithcheck-inmessagesatoddhours,highercellphonebillsandtheneedtotellacquaintancestostopannouncingwhatthey'rehavingfordinner."[530]Thefollowingyear,JohnC.DvorakdescribedTwitteras"thenewCBradio".[531] Emergencyuse ApracticaluseforTwitter'sreal-timefunctionalityisasaneffectivedefactoemergencycommunicationsystemforbreakingnews.Itwasneitherintendednordesignedforhigh-performancecommunication,buttheideathatitcouldbeusedforemergencycommunicationwasnotlostonthecreators,whoknewthattheservicecouldhavewide-reachingeffectsearlyonwhenthecompanyusedittocommunicateduringearthquakes.[532] AnotherpracticalusethatisbeingstudiedisTwitter'sabilitytotrackepidemicsandhowtheyspread.[533] AdditionallyTwitterservesasareal-timesensorfornaturaldisasterssuchasbushfiresandearthquakes.[534][535] Education Twitterhasbeenadoptedasacommunicationandlearningtoolineducationalandresearch[536]settingsmostlyincollegesanduniversities.[537][538]Ithasbeenusedasabackchanneltopromotestudentinteractions,especiallyinlarge-lecturecourses.[539]ResearchhasfoundthatusingTwitterincollegecourseshelpsstudentscommunicatewitheachotherandfaculty,promotesinformallearning,allowsshystudentsaforumforincreasedparticipation,increasesstudentengagement,andimprovesoverallcoursegrades.[540][541][542] Twitterhasbeenanincreasinglygrowinginthefieldofeducation,asaneffectivetoolthatcanbeusedtoencouragelearningandidea,orknowledgesharing,inandoutsidetheclassroom.[543]Byusingorcreatinghashtags,studentsandeducatorsareabletocommunicateunderspecificcategoriesoftheirchoice,toenhanceandpromoteeducation.Abroadexampleofahashtagusedineducationis"edchat",tocommunicatewithotherteachers,andpeopleusingthathashtag.Onceteachersfindsomeonetheywanttotalkto,theycaneitherdirectmessagetheperson,ornarrowdownthehashtagtomakethetopicoftheconversationmorespecificusinghashtagsforscichat(science),engchat(English),sschat(socialstudies).[543] Ina2011study,researchersfoundthatyoungpeoplesuseofTwitterhelpedtoimproverelationshipswithteachers,encourageinteractivelearning,andultimatelyleadtohighgrades.[543]Inthesamestudyitwasfoundthatoutofagroupof158educators,92%agreedthatthereasontheyuseTwitterisbecauseofhowuserfriendlyitis,[543]another86%agreedthattheystartedandcontinueusingTwitterbecauseofhoweasyitistolearn,andfinally,[543]93%saidtheyuseTwitterbecauseitisfree.Peoplefoundthatsiftingthroughlargeamountsofdataischallenging,however,withthesimplenatureofTwitterlargeamountofinformationbecameeasilyaccessible.[544]Muchofthissimplicitycomesfromtheuseofthehashtag,andtheintuitivenatureofhowTwitterasamicrobloggingsiteoperates.[544]Thesefeatureshelptopromoteeducationoutsidetheclassroominaglobalsettingwherestudentsandeducatorsareeasilyabletocreate,connect,andshareknowledge.Thisultimatelypromotesgrowthandlearningamongstudentsandeducators,notjustintheclassroom,butvirtuallyandaroundtheworld. Publicfigures TechwriterBruceSterlingcommentedin2007thatusingTwitterfor"literatecommunication"is"aboutaslikelyasfiringupaCBradioandhearingsomeguyrecitetheIliad".[545]InSeptember2008,thejournalistCliveThompsonmusedinaNewYorkTimesMagazineeditorialthattheservicehadexpandednarcissisminto"anew,supermetabolicextreme—theultimateexpressionofagenerationofcelebrity-addledyouthswhobelievetheireveryutteranceisfascinatingandoughttobesharedwiththeworld".[546]Oneoftheearliestdocumentedformsofcelebrity-relatedTwitter-likedisclosuresdatesfrom1980,whenrealestatemogulWilliamDesmondRyanmaderound-the-clockpressreleasesabouthisrelationshipwithcomedianPhyllisDiller,evenrevealingwhatshewasmakinghimfordinneronanightlybasis.[547]Conversely,VancouverSuncolumnistSteveDottoopinedthatpartofTwitter'sappealisthechallengeoftryingtopublishsuchmessagesintightconstraints,[548]andJonathanZittrain,professorofInternetlawatHarvardLawSchool,saidthat"thequalitiesthatmakeTwitterseeminaneandhalf-bakedarewhatmakesitsopowerful."[549]Inthatsamevein,andwithSigmundFreudinmind,politicalcommunicationsexpertMatthewAuerobservedthatwell-craftedtweetsbypublicfiguresoftendeliberatelymixtrivialandseriousinformationsoastoappealtoallthreepartsofthereader'spersonality:theid,ego,andsuperego.[550] ThepoetsMiraGonzalezandTaoLinpublishedabooktitledSelectedTweetsfeaturingselectionsoftheirtweetsoversomeeightyears.Thebookwasdesignedtolooklikeasmallbible.[551] ThenovelistRickMoodywroteashortstoryforElectricLiteraturecalled"SomeContemporaryCharacters,"composedentirelyoftweets.[552] In2009,NielsenOnlinereportedthatTwitterhadauser-retentionrateoffortypercent.Manypeoplestopusingtheserviceafteramonth;thereforethesitemaypotentiallyreachonlyabouttenpercentofallInternetusers.[553]In2009,Twitterwonthe"BreakoutoftheYear"WebbyAward.[554][555]DuringaFebruary2009discussiononNationalPublicRadio'sWeekendEdition,thejournalistDanielSchorrstatedthatTwitteraccountsofeventslackedrigorousfact-checkingandothereditorialimprovements.Inresponse,AndyCarvingaveSchorrtwoexamplesofbreakingnewsstoriesthatplayedoutonTwitterandsaiduserswantedfirst-handaccountsandsometimesdebunkedstories.[556]OnNovember29,2009,TwitterwasnamedtheWordoftheYearbytheGlobalLanguageMonitor,declaringit"anewformofsocialinteraction".[557]Timemagazineacknowledgeditsgrowinglevelofinfluenceinits2010Time100;todeterminetheinfluenceofpeople,itusedaformulabasedonfamoussocialnetworkingsites,TwitterandFacebook.ThelistrangesfromBarackObamaandOprahWinfreytoLadyGagaandAshtonKutcher.[558][559]TheU.S.government,seeingsocialmedia'sroleinthe2010ArabSpringrevolts,covertlydevelopedaCubanalternativetoTwittercalledZunZuneoaspartofalong-termstrategyto"stirunrest".Theservicewasactivefrom2010to2012.[560] Duringthe2012SummerOlympicsopeningceremony,inwhichheappearedattheLondonOlympicStadiuminperson,[561]SirTimBerners-Lee,thefounderoftheWorldWideWeb,tweeted"Thisisforeveryone",[562]whichwasinstantlyspelledoutinLCDlightsattachedtothechairsofthe80,000peopleintheaudience.[561] ManycommentatorshavesuggestedthatTwitterradicallychangedtheformatofreportingduetoinstant,short,andfrequentcommunication.[563][564]AccordingtoTheAtlanticwritersBenjaminM.ReillyandRobinsonMeyer,Twitterhasanoutsizedimpactonthepublicdiscourseandmedia."SomethinghappensonTwitter;celebrities,politiciansandjournaliststalkaboutit,andit'scirculatedtoawideraudiencebyTwitter'salgorithms;journalistswriteaboutthedustup."ThiscanleadtoanargumentonaTwitterfeedlookinglikea"debateroilingthecountry...regularpeopleareleftwithaconfused,agitatedviewofourcurrentpoliticaldiscourse".[565]Ina2018articleintheColumbiaJournalismReview,MatthewIngramarguedmuchthesameaboutTwitter's"oversizedrole"andthatitpromotesimmediacyovernewsworthiness.[566]Insomecases,inauthenticandprovocativetweetsweretakenupascommonopinioninmainstreamarticles.WritersinseveraloutletsunintentionallycitedtheopinionsofRussianInternetResearchAgency-affiliatedaccounts.[566][567] Worldleaders DonaldTrump'sTwitterpost WorldleadersandtheirdiplomatshavetakennoteofTwitter'srapidexpansionandhavebeenincreasinglyutilizingTwitterdiplomacy,theuseofTwittertoengagewithforeignpublicsandtheirowncitizens.USAmbassadortoRussia,MichaelA.McFaulhasbeenattributedasapioneerofinternationalTwitterdiplomacy.HeusedTwitterafterbecomingambassadorin2011,postinginEnglishandRussian.[568]OnOctober24,2014,QueenElizabethIIsentherfirsttweettomarktheopeningoftheLondonScienceMuseum'sInformationAgeexhibition.[569]A2013studybywebsiteTwiplomacyfoundthat153ofthe193countriesrepresentedattheUnitedNationshadestablishedgovernmentTwitteraccounts.[570]Thesamestudyalsofoundthatthoseaccountsamountedto505Twitterhandlesusedbyworldleadersandtheirforeignministers,withtheirtweetsabletoreachacombinedaudienceofover106 millionfollowers.[570] Accordingtoananalysisofaccounts,theheadsofstateof125countriesand139otherleadingpoliticianshaveTwitteraccountsthathavebetweenthemsentmorethan350,000tweetsandhavealmost52 millionfollowers.However,only30ofthesedotheirowntweeting,morethan80donotsubscribetootherpoliticiansandmanydonotfollowanyaccounts.[571] DonaldTrumpusedTwitterasamethodofprovidingideasandinformationduringhispresidentialcampaignin2016,thetransitionalperiodandasUSPresident.AstudyperformedatRose-HulmanInstituteofTechnologyshowedhistweetsfromthesedifferenttimeperiodsandthroughanalysisofhistweets,theprofessorsfoundthatPresidentTrumpusesamodecalled"forensicmode"themostofteninhistweets.Thisisdescribedasaquickreactiveusage,astheyfoundheoftenusedTwittertoshowhisjudgmentoftheeventsthatoccurredregardingbothhisalliesandhisenemies.[572]Afterhiselectiontothepresidencyhetweetedthis"forensic-style"tweet,"Justhadaveryopenandsuccessfulelection.Nowprofessionalprotesters,incitedbythemedia,areprotesting.VeryUnfair!".[573] InastudydoneatNewYorkUniversityin2015,ananalysisandcomparisonoftheTwitteraccountsofDonaldTrump,JebBush,BernieSanders,andHillaryClinton,foundobservationsshowingthegoalsofeachcandidate'sTwitterduringtheirrespectiveprimaryelections.SomecomparisonsthatweremadeweretheuseofAristotle'stheoryofRhetoric.TheresearchfoundthatDonaldTrumpusedpathos,theappealtoemotion,inhisrhetoric;BernieSanderstendedtouseethosandlogosforhisTwitter;HillaryClintontendedtouselogosandpathostotrytoconveyhervalues,andJebBushshowsthatheusesamixofallthreeonhisaccount.Thestudyalsolookedatthemediaresponsetothetweetsduringtheelection.Thestudyfoundthatthetweetsbecamemorepersuasiveforthecandidatesifthemediaputthetweetsinfrontofmoreviewers,versuslesspowerfuliftheywereonlyvisibletothosealreadyonTwitter.Inthatway,presidentialcandidateswhohadtheirtweetscoveredmoreinthenewswereabletogettheirmessagetomorepotentialvoters.[574] Religion AsofOctober2015,morethantwentyRomanCatholiccardinalsmanagedactiveTwitteraccounts,[575]nineofwhomwerecardinalelectorsforthe2013Papalconclave.[576]PopeBenedictXVI'sTwitteraccountwassetupin2012.AsofApril2016,hissuccessor,PopeFrancis,has9.06 millionfollowersofhisTwitteraccount(@Pontifex).[577][needsupdate] Censorshipandmoderation Mainarticles:CensorshipofTwitter,Deplatforming,andTwittersuspensions TwitterisbannedcompletelyinRussia,[578]Iran,ChinaandNorthKorea,[579]andhasbeenintermittentlyblockedinnumerouscountriesincludingEgypt,Iraq,Nigeria,Turkey,VenezuelaandTurkmenistanondifferentbases.[580][581][582][583][584][585]In2016,TwittercooperatedwiththeIsraeligovernmenttoremovecertaincontentoriginatingoutsideIsraelfromtweetsseeninIsrael.[586]Inthe11thbiannualtransparencyreportpublishedonSeptember19,2017,TwittersaidthatTurkeywasthefirstamongcountrieswhereabout90percentofremovalrequestscamefrom,followedbyRussia,FranceandGermany.[587]TwitterstatedthatbetweenJuly1andDecember31,2018,"Wereceivedlegaldemandsrelatingto27,283accountsfrom47differentcountries,includingBulgaria,Kyrgyzstan,Macedonia,andSloveniaforthefirsttime."[588]AspartofevidencetoaUSSenateEnquiry,thecompanyadmittedthattheirsystems"detectedandhid"severalhundredthousandtweetsrelatingtothe2016DemocraticNationalCommitteeemailleak.[589]DuringthecurfewinJammuandKashmirafterrevocationofitsautonomousstatusonAugust5,2019,theIndiangovernmentapproachedTwittertoblockaccountsaccusedofspreadinganti-Indiacontent;[590]byOctober25,nearlyonemilliontweetshadbeenremovedasaresult.[591] Hashtagsuppression Afterclaimsinthemediathatthehashtags#wikileaksand#occupywallstreetwerebeingcensoredbecausetheydidnotshowuponthesite'slistoftrendingtopics,Twitterrespondedbystatingthatitdoesnotcensorhashtagsunlesstheycontainobscenities.[592][593][594] Trust&SafetyCouncil TheannouncementofTwitter's"Trust&SafetyCouncil"wasmetwithobjectionfrompartsofitsuserbase.[595][596]Criticsaccusedthememberorganizationsofbeingheavilyskewedtowards"therestrictionofhatespeech"andaReasonarticleexpressedconcernthat"there'snotasingleuncompromisinganti-censorshipfigureorgrouponthelist".[597][598] Moderationoftweets Twitterremovedmorethan88,000propagandaaccountslinkedtoSaudiArabia.[599]TwitterremovedtweetsfromaccountsassociatedwiththeRussianInternetResearchAgencythathadtriedtoinfluencepublicopinionduringandafterthe2016election.[566][567]InJune2020,Twitteralsoremoved175,000propagandaaccountsthatwerespreadingbiasedpoliticalnarrativesfortheCommunistPartyofChina,theUnitedRussiaParty,orTurkey'sPresidentErdogan,identifiedbasedoncentralizedbehavior.[600][601]TwitteralsoremovedaccountslinkedtothegovernmentsofArmenia,Egypt,Cuba,Serbia,Honduras,IndonesiaandIran.[602][603][604]TwittersuspendedPakistaniaccountstiedtogovernmentofficialsforpostingtweetsabouttheKashmirconflictbetweenIndiaandPakistan.[605]InFebruary2021,TwitterremovedaccountsinIndiathatcriticizedPrimeMinisterNarendraModi'sgovernmentforitsconductduringIndianfarmers'protestsin2020–2021.[606] Atthestartofthe2020COVID-19pandemic,numeroustweetsreportedfalsemedicalinformationrelatedtothepandemic.Twitterannouncedanewpolicyinwhichtheywouldlabeltweetscontainingmisinformationgoingforward.[105]InApril2020,TwitterremovedaccountswhichdefendedPresidentRodrigoDuterte'sresponsetothespreadofCOVID-19inthePhilippines.[607] InNovember2020,thenChiefTechnologyOfficerandfutureCEOofTwitterParagAgrawal,whenaskedbyMITTechnologyReviewaboutbalancingtheprotectionoffreespeechasacorevalueandtheendeavourtocombatmisinformation,said:"OurroleisnottobeboundbytheFirstAmendment,butourroleistoserveahealthypublicconversation…focuslessonthinkingaboutfreespeech,butthinkingabouthowthetimeshavechanged."[608] LogoofBirdwatch,aplannedTwitterprogram Aspartofitsmeanstomoderatemisinformation,Twitterlauncheditscrowd-sourcedBirdwatchprograminJanuary2021.Trustedusersintheprogramwillhavetheabilitytomonitortweetsandrepliesthatmayincludemisinformationandcountermessagesprovidingfact-checkingastohaveTwittertagthesemessagesappropriatelyfromtheBirdwatchcommunity.[609] InNovember2021,TwitterannouncedanupdatetotheBirdwatchmoderationtool,meanttolimitthevisibilityofcontributors'identitiesbycreatingaliasesfortheiraccounts.[610] InMarch2022,TwitterexpandedaccesstonotesmadebytheBirdwatchmoderators,givingarandomizedsetofUSuserstheabilitytoviewthenotesattachedtotweetsandratethem.Userscanchooseoneofthreeoptions:"Helpful","Somewhat"or"No".TheexpansionfollowedafterTheWashingtonPost'sreportonBirdwatchbeingtooopaque.[611][612] ModerationofPresidentDonaldTrump Mainarticle:SocialmediausebyDonaldTrump§ Twitter ThetwotweetsonMay26,2020,fromPresidentTrumpthatTwitterhadmarked"potentiallymisleading"(insertingthebluewarningiconand"Getthefacts..."language)thatledtotheexecutiveorder DonaldTrumphadjoinedTwitterin2009,priortohispresidency.ManyTwitteremployeeshadexpressedconcerntothecompany'smanagementabouthostingTrumppriortoandatthestartofhispresidency.Trumpcontinuedtousehispersonalaccount"@realDonaldTrump",ratherthantheofficialpresidentialaccount"@POTUS"thatTwitterhadarrangedpreviously.TwitteremployeesremainedhighlyskepticalofTrump'suseofTwitter,particularlyaftertheshooterinthe2019ElPasoshootinghadwrittenamanifestothatrecitedmanyofTrump'spriortweets;employeesconsideredTrumpwasusingTwitterasa"dogwhistle".Twitteroptedtoeliminateallpoliticaladvertisinginwakeofthis.[613] AfterTrumphadusedhisTwitteraccountonMay26,2020,toissueastatementrelatedtopossiblefraudassociatedwithmail-invotingaheadoftheupcoming2020primaryelections.TwittermoderatorsusedtheaforementionedtoolstomarkTrump'stweetsas"potentiallymisleading"andaddedlinkstoadedicatedpagewithadditionalarticlesfromothernewssourcesonmail-invoting,thefirsttimetheyhadmarkedTrump'stweetsassuch.[614]Trump,whohadpreviouslyallegedTwitter,andothertechnologycompanies,haveananti-conservativebias,[615]announcedhisintentiontoenactregulationstotakeactionagainstTwitter.Twodayslater,onMay28,2020,Trumpsigned"ExecutiveOrderonPreventingOnlineCensorship"[616]aimedtoimpacttheprotectionsofSection230oftheCommunicationsDecencyActwhichTwitterandothersocialmediasiteshavetoavoidliabilityfordealingwithmoderationofusercontentontheirplatforms.[617][618][619] Aroundthistime,themurderofGeorgeFloyd,anAfrican-American,inanincidentinvolvingthreeWhiteandoneHmongMinneapolisPoliceDepartmentofficersonMay25,sparkedracially-drivenriotsinthecitythatturnedviolentbytheeveningofMay28.Trumptweetedhisopinionontheviolentprotests,statinghehadspokentostategovernorTimWalzaboutbringingNationalGuardforcestohelpcalmthesituation,butconcludedthetweetbysaying"Anydifficultyandwewillassumecontrolbut,whenthelootingstarts,theshootingstarts."Twitter,afterinternalconsultationwithitsreviewboardsandmanagement,optedtoadda"publicinterestnotice"[620]tothetweet,[621]warningusersit"glorifiedviolence"andwhiletheynormallywouldhaveremovedsuchpostsinthepast,they"havekepttheTweetonTwitterbecauseitisimportantthatthepublicstillbeabletoseetheTweetgivenitsrelevancetoongoingmattersofpublicimportance."[622]TwitteruserswerestillabletoviewTrump'stweetiftheychosetoclickonit,butcouldnotlikeorretweetitwithouttheirowncomment.[623] Mainarticle:Biden–Ukraineconspiracytheory Goingintothelatemonthsofthe2020UnitedStatespresidentialelection,TwittercontinuedtomarkseveraltweetsfromTrump,otherconservativelawmakers,andvariousalt-andfar-rightuserswithsimilarmisinformationlabels,ortakingotheractionswhenthesetweetsviolatedtheiruserpolicy.OnOctober14,2020,theNewYorkPostpublishedastorycontainingallegationsaboutHunterBiden,sonofJoeBiden.TwitterandFacebookbothimplementedmeasuresontheirplatformstopreventsharingoftheNewYorkPostarticle,withTwitterdoingsoaccordingtotheirHackedMaterialsPolicyandFacebookperapolicythat"inmanycountries,includingintheU.S.,ifwehavesignalsthatapieceofcontentisfalse,wetemporarilyreduceitsdistributionpendingreviewbyathird-partyfact-checker."[624][625][626]CommentatorsfromvariedpoliticalbackgroundscriticizedtheactionstakenbyFacebookandTwitter,arguingthattheycouldhaveamplifieddisinformationduetotheStreisandeffect.[627] Aftertheelection,inwhichBidenhadbeendeterminedtobethewinner,Trumpandseveralofhisalliescontinuedtodisputetheresultsthroughlegalactions,whilecontinuingtoasserttherewasfraudandotherinconsistenciesonTwitter.Twittercontinuedtoapplytheirmoderationastheyhaddonebefore.TheNewYorkTimesestimatedthat34%ofTrump'stweetsinthedaysaftertheelectionwereflaggedbyTwitter.[613]TrumpcontinuedtothreatenrevokingSection230duetoactionsbyTwitterandothersocialmediacompaniesbydemandingCongressincludeitsrevokingintheWilliamM.(Mac)ThornberryNationalDefenseAuthorizationActforFiscalYear2021.[628]Separately,newsocialmediacompaniessuchasParlerwerecreatedtocaterspecificallytoconservativeandright-leaningvoicesthatfeltthatTwitterandothersocialmediacompaniesweresuppressingtheirvoice.[629] Seealso:2021stormingoftheUnitedStatesCapitol Messagedisplayedonthe"@realDonaldTrump"accountafterTrump'sbanonJanuary8,2021 OnJanuary6,2021,pro-TrumpprotestorsstormedtheUnitedStatesCapitolbuildingtoviolentlydisrupttheElectoralCollegevotecountafterTrumphadheldarallyearlierinthedaypromotingtheprotestorstomarchtotheCapitolandchallengetheelectionresults.Duringthestorming,Trumphadtweetedmessagesincludingavideomessagetotrytourgecalmbutwhichcontinuedtoasserttheelectionwasfraudulent.TwitterlockeddownTrump'saccountforatwelve-hourperiod,preventinganyonefromretweetingorreplyingtothetweets,andinformedTrumptheywouldrestoreaccessifheremovedthreespecifictweetsthatcontinuedtoassertelectionfraudandwouldpermanentlyblockhisaccountshouldhecontinuetomakesuchclaims.[630]TrumpcompliedwithremovingtheindicatedtweetsbyJanuary7.[631]However,fromtweetsthatTrumphadpostedfollowingthetemporaryblock,TwitterpermanentlysuspendedTrump'saccount"duetotheriskoffurtherincitementofviolence"onJanuary8.[632][633]TwitterpointedtotwoofTrump'stweetsmadeonJanuary7astroublesome.OneofTrump'stweetstated"The75,000,000greatAmericanPatriotswhovotedforme,AMERICAFIRST,andMAKEAMERICAGREATAGAIN,willhaveaGIANTVOICElongintothefuture.Theywillnotbedisrespectedortreatedunfairlyinanyway,shapeorform!!!",whileasecondindicatedthathewouldnotbeattendingBiden'sinauguration,whichTwittertooktogetheras"likelytoinspireotherstoreplicatetheviolentactsthattookplaceonJanuary6,2021,andthattherearemultipleindicatorsthattheyarebeingreceivedandunderstoodasencouragementtodoso."[632] Twitteralsoproactivelytookstepsagainstthe"@POTUS"Twitteraccount,whichTrumphadstartedtouseafterhisaccountwasbanned,blockingmessagespostedthereaspartofTrump'sbanevasion.[632]Trumpalsoattemptedtousehiscampaign'sTwitteraccountbeforeitwassimilarlyblocked.[634]Twitter'sCEOJackDorseyandotherexecutiveshadbeenhesitanttoevokeabanonTrump,butwaspressuredbyemployeesandmembersofthesafetyteamwhohadseenTrump'stweetscreatingchatterfromright-wingaccountsonTwitterandonright-wingsocialmediasiteslikeParler.[613]InadditiontobanningTrump,inthefollowingweekendTwittersubsequentlybannedorblockedmorethan70,000accountsthatweretiedtoQAnonthatwerecontinuingtopromoteelectionfraudandpro-Trumpconspiracytheories.[613] Twitter'sdecisionwascriticizedbyfreespeechadvocatessuchastheAmericanCivilLibertiesUnion.[613]ChancellorofGermanyAngelaMerkelcriticizedthebansayingthat"lawmakersshouldsettherulesgoverningfreespeechandnotprivatetechnologycompanies."[120]ThepresidentofMexicoAndrésManuelLópezObradorsaidthat"havingprivatecompaniesdecidewhocanbesilencedandcensoredgoesagainstfreedomofspeech."[635]OnJanuary14,TwitterCEOJackDorseydefendedbanningTrump,butalsosaidit"setsaprecedentIfeelisdangerous,"butadded"Everythingwelearninthismomentwillbetteroureffort,andpushustobewhatweare:onehumanityworkingtogether."[636][613] TrumptooklegalactionagainstTwitterinOctober2021intheUnitedStatesDistrictCourtfortheSouthernDistrictofFlorida,assertingthatTwitter'sbanviolatedhisFirstAmendmentrightsaswellasillegalunderFlorida'sdeplatforminglawthathadbeenpassedbythestateinMay2021byblockedbyafederaljudgeinJuly2021.[637] Fines,penaltiesandsanctions Violationofcampaignfinancelaws InOctober2020,Twitterwasfined$100,000byWashingtonStateforviolatingthatstate'scampaignfinancedisclosurerules.AjudgementfiledonOctober13,2020,found"thesocialmediaplatformfailedtomaintainpublicinspectionrecordsofnearly$200,000paidtoitforpoliticaladsinviolationofstatelaw"accordingtoWashingtonAttorneyGeneralBobFerguson.[638] Television TwitterisincreasinglyusedforTVtobemoreinteractive.[639]Thiseffectissometimesreferredtoasthesecondscreen,[640]"virtualwatercooler"orsocialtelevision—thepracticehasbeencalled"chatterboxing".[641]TwitterhasbeensuccessfullyusedtoencouragepeopletowatchliveTVevents,suchastheOscars,theSuperBowl[642]andtheMTVVideoMusicAwards;howeverthisstrategyhasprovenlesseffectivewithregularlyscheduledTVshows.[643]Suchdirectcross-promotionshavebeenbannedfromFrenchtelevisionduetoregulationsagainstsecretadvertising.[644] InDecember2012,TwitterandNielsenenteredamulti-yearagreementtoproducesocialTVratings,whichareexpectedtobecommerciallyavailableforthefall2013seasonastheNielsenTwitterTVRating.[645]AdvertisingAgesaidTwitterhadbecomethenewTVGuide.[646]TheninFebruary2013,TwitteracquiredBluefinLabsforanestimatedUS$50 millionto$100 million.Foundedin2008attheMITMediaLab,Bluefinisadataminerwhoseanalysistellswhichbrands(e.g.,TVshowsandcompanies)arechattedaboutthemostinsocialmedia.[645][647]MITTechnologyReviewsaidthatBluefingivesTwitterpartoftheUS$72 billiontelevisionadvertisingmarket.[648] InMay2013,itlaunchedTwitterAmplify—anadvertisingproductformediaandconsumerbrands.[649]WithAmplify,Twitterrunsvideohighlightsfrommajorlivebroadcasts,withadvertisers'namesandmessagesplayingbeforetheclip.[650]InOctober2013,ComcastannouncedthatithadpartneredwithTwittertoimplementits"SeeIt"featurewithintheservice,allowingpostspromotingprogramsonselectedNBCUniversalchannelstocontaindirectlinkstoTVEverywherestreamingtotheprogram.Onlaunch,theconceptwaslimitedtoNBCUniversalchannelsandXfinitycabletelevisionsubscribers.[651] InanattempttocompetewithTwitter'sleadershipinTV,Facebookintroducedanumberoffeaturesin2013todriveconversationaboutTVincludinghashtags,verifiedprofilesandembeddableposts.ItalsoopenedupnewdatavisualizationAPIsforTVnewsandothermediaoutlets,enablingthemtosearchforawordandseeafirehoseofpublicpoststhatmentionitaswellasshowhowmanypeoplementionedawordinbothpublicandprivatepostsduringasettimeframe,withademographicbreakdownoftheage,gender,andlocationofthesepeople.[652]InJanuary2014,FacebookannouncedapartnershipwithUK-basedsocialTVanalyticscompanySecondSyncwhichsawthesocialnetworkmakeitssocialTVavailableoutsidethecompanyforthefirsttime.FacebookstruckthepartnershiptohelpmarketersunderstandhowpeopleareusingthesocialnetworktotalkabouttopicssuchasTV.[653]However,TwitterrespondedbyacquiringSecondSyncandParisiansocialTVfirmMesagraphthreemonthslater.Theseacquisitions,aswellasapartnershipwithresearchcompanyKantar(whichithadbeenworkingwithtodevelopasuiteofanalyticstoolsfortheBritishTVindustrysinceAugust2013)strengthenedTwitter'sdominanceofthe"secondscreen"–TVviewersusingtabletsandsmartphonestosharetheirTVexperienceonsocialmedia.Withtheadditionalanalytictools,Twitterwasabletoimprovethefirm'sofferingtoadvertisers,allowingthemto,forinstance,onlypromoteatweetontothetimelinesofuserswhowerewatchingacertainprogramme.[654] ByFebruary2014,allfourmajorU.S.TVnetworkshadsigneduptotheAmplifyprogram,bringingavarietyofpremiumTVcontentontothesocialplatformintheformofin-tweetreal-timevideoclips.[655]InMarch2014,ITVbecamethefirstmajorbroadcasterintheUKtosignuptoTwitterAmplify[656]andTwitterintroducedone-tapvideoplaybackacrossitsmobileappstofurtherenhancetheconsumerexperience.[657] InJune2014,TwitteracquireditsAmplifypartnerintheU.S.,SnappyTV.[658]InEurope,Twitter'sAmplifypartnerisLondon-basedGrabyo,whichhasalsostrucknumerousdealswithbroadcastersandrightsholders[83]tosharevideocontentacrossFacebookandTwitter.[659]InJuly2017,TwitterannouncedthatitwouldwinddownSnappyTVasaseparatecompany,andintegrateitsfeaturesintotheMediaStudiosuiteonTwitter.[660] Statistics Useraccountswithlargefollowerbase Mainarticle:Listofmost-followedTwitteraccounts Asof18 February 2022[update],thetenTwitteraccountswiththemostfollowerswere:[661][662] Rank Change(monthly) Accountname Owner Followers(millions) Activity Country 1 @BarackObama BarackObama 130 44thU.S.president  USA 2 @justinbieber JustinBieber 114 Musician  CAN 3 @katyperry KatyPerry 108 Musician  USA 4 @rihanna Rihanna 104 Musicianandbusinesswoman  BAR 5 @Cristiano CristianoRonaldo 97 Footballer  POR 6 @taylorswift13 TaylorSwift 90 Musician  USA 7 @ladygaga LadyGaga 84 Musicianandactress  USA 8 @TheEllenShow EllenDeGeneres 77 Comedianandtelevisionhostess  USA 9 @narendramodi NarendraModi 75 PrimeMinisterofIndia  IND 10 @elonmusk ElonMusk 74 Entrepreneurandbusinessmagnate  USA CAN RSA Oldestaccounts TheoldestTwitteraccountsare14accountsthatbecameactiveonMarch21,2006,allbelongingtoTwitteremployeesatthetimeandincluding@jack(JackDorsey),@biz(BizStone),and@noah(NoahGlass).[663] Recordtweets Mainarticle:Listofmost-retweetedtweets Aselfieorchestratedby86thAcademyAwardshostEllenDeGeneresduringtheMarch2,2014,broadcastwasatthetimethemostretweetedimageever.[664][665]DeGeneressaidshewantedtopayhomagetoMerylStreep'srecord17Oscarnominationsbysettinganewrecordwithher,andinvitedotherOscarcelebritiestojointhem.Theresultingphotooftwelvecelebritiesbrokethepreviousretweetrecordwithinfortyminutes,andwasretweetedover1.8 milliontimesinthefirsthour.[666][667][668]Bytheendoftheceremonyithadbeenretweetedover2 milliontimes;lessthan24hourslater,ithadbeenretweetedover2.8 milliontimes.[665][666]Asof18 March 2014[update],ithasbeenretweetedover3.4 milliontimes.[665]ThegroupselfieeffortwasparodiedbyLego,andMattGroeningwithTheSimpsons.[669][670]Itbeatthepreviousrecord,778,801,whichwasheldbyBarackObama,followinghisvictoryinthe2012presidentialelection.[668][671][672]OnMay9,2017,Ellen'srecordwasbrokenbyCarterWilkerson(@carterjwm)bycollectingnearly3.5 millionretweetsinalittleoveramonth.[673] AccordingtoGuinnessWorldRecords,thefastestpacetoamillionfollowerswassetbyactorRobertDowneyJr.in23hoursand22minutesinApril2014.[674]ThisrecordwaslaterbrokenbyCaitlynJenner,whojoinedthesiteonJune1,2015,andamassedamillionfollowersinjust4hoursand3minutes. ThemosttweetedmomentinthehistoryofTwitteroccurredonAugust2,2013;duringaJapanesetelevisionairingoftheStudioGhiblifilmCastleintheSky,fanssimultaneouslytweetedthewordbalse(バルス)—theincantationforadestructionspellusedduringitsclimax,afteritwasutteredinthefilm.Therewasaglobalpeakof143,199tweetsinonesecond,beatingthepreviousrecordof33,388.[675][676] ThemostdiscussedeventinTwitterhistoryoccurredonOctober24,2015;thehashtag("#ALDubEBTamangPanahon")forTamangPanahon,alivespecialepisodeoftheFilipinovarietyshowEatBulaga!atthePhilippineArena,centeringonitspopularon-aircoupleAlDub,attracted41 milliontweets.[677][678]Themost-discussedsportingeventinTwitterhistorywasthe2014FIFAWorldCupsemi-finalbetweenBrazilandGermanyonJuly8,2014.[679] Onthedayofthe2016U.S.presidentialelection,Twitterprovedtobethelargestsourceofbreakingnews,withover40 milliontweetssentthatday.[680] Seealso Companiesportal Ambientawareness Comparisonofmicrobloggingservices ListofmergersandacquisitionsbyTwitter Timelineofsocialmedia Twitterature Notes ^ItisnotdocumentedwhethertheparallaxscrollingeffectwasaddedwiththeredesigninApril2014orsubsequently. 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^"BarackObamavictorytweetmostretweetedever".BBCNews.November7,2012.RetrievedNovember8,2013. ^"Fourmoreyears"BarackObamaonTwitter,November6,2012. ^@Twitter(May10,2017)."@carterjwm👆It'sofficial.Carter,yourTweetisthemostRetweetedofalltime.#NuggsForCarter"(Tweet).RetrievedMay9,2017–viaTwitter. ^"FastesttimetoreachonemillionfollowersonTwitter".GuinnessWorldRecords.April12,2014.RetrievedMay19,2015. ^Oremus,Will(August19,2013)."BalseFestival:Japan"CastleintheSky"airingbreaksTwitterrecordfortweetspersecond".Slate.RetrievedJune26,2014. ^Ashcraft,Brian."HowanOldJapaneseAnimeBrokeaTwitterRecord".Kotaku.RetrievedAugust31,2018. ^"FansinthePhilippines&aroundtheworldsent41MTweetsmentioning#ALDubEBTamangPanahon".TwitterDataVerifiedAccount.October27,2015.RetrievedOctober30,2015. ^Mendoza,Arvin(October25,2015)."'AlDub'breaksFIFAWorldCup'sTwitterrecord".PhilippineDailyInquirer.RetrievedOctober25,2015. 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Furtherreading Fitton,Laura;Gruen,MichaelE.;Poston,Leslie;forewordbyJackDorsey(2009).TwitterforDummies.Hoboken,NJ:WileyPublishing.ISBN 9780470479919. Tufekci,Zeynep.2017.TwitterandTearGas:ThePowerandFragilityofNetworkedProtest.YaleUniversityPress. Externallinks TwitteratWikipedia'ssisterprojectsDefinitionsfromWiktionaryMediafromCommonsNewsfromWikinewsQuotationsfromWikiquoteTextbooksfromWikibooksResourcesfromWikiversityDatafromWikidata ScholiahasatopicprofileforTwitter. Officialwebsite(Mobile) twitter3e4tixl4xyajtrzo62zg5vztmjuricljdp2c5kshju4avyoid.onion(Accessinglinkhelp) BusinessdataforTwitter,Inc.:GoogleFinanceYahoo!FinanceBloombergSECfilings vteTwitterClients Favstar Gnip Hootsuite Seesmic SimplyTweet Tween Tweetbot TweetDeck Tweetie Twimight TwitPic Twitterrific Executives ParagAgrawal(CEO) NedSegal(CFO) SarahPersonette(CCO) LeslieBerland(CMO) Board BretTaylorIndependentBoardChair ParagAgrawal(CEO) MimiAlemayehou JackDorsey EgonDurban MarthaLaneFox OmidKordestani Fei-FeiLi PatrickPichette DavidRosenblatt RobertZoellick Software Bluesky FlockDB Periscope Starling Vine Mergersandacquisitions BackType BluefinLabs Dasient Gnip Mitro NamoMedia Posterous Summify Trendrr TweetDeck Tweetie Vine WhisperSystems Lists Features Most-followedaccounts Most-retweetedtweets Most-likedtweets Most-viewedvideosinthefirst24hours Culture BlackTwitter Hashtag MilkshakeDuck StanTwitter Twitterature Twitterdiplomacy Twittertrends Twitterverification URLshorteners WeirdTwitter Other 2020accounthijacking Censorship RepublikTwitter Suspensionsandbans ShortyAwards Timeline TwitterBlue Twitterbomb Twitterusage bypublicfigures TopsyLabs WikiLeaks-relatedcourtorders Linkstorelatedarticles vteMicrobloggingWebsites Facebook Twitter Tumblr LinkedIn SinaWeibo Diaspora Edmodo Fanfou Gab Gettr Identi.ca micro.blog migme Myspace Parler Plurk Qzone Solaborate TruthSocial Viadeo VK XING Defunct App.net GoogleBuzz Google+ Heello Jaiku Meme Me2day Natter Posterous Pownce Qaiku TencentWeibo Tout PlatformsOStatus-compatible Friendica GNUsocial PeerTube ActivityPub-compatible Friendica GNUsocial PeerTube Mastodon Diaspora OpenMicroBlogging pump.io Twister WebfingerFeatures Reblogging Activitystream Lifestreaming Hashtag Backchannel Mention/Replies Othertopics MicroblogginginChina Microbloggingnovel Micropoetry Comparisonofmicrobloggingservices vteSocialnetworkingservicesPersonal 23snaps Amikumu aNobii Ask.fm Badoo Bumble Clash Cloob Clubhouse Cyworld Diaspora display! Douban Draugiem.lv Ello Facebook FoursquareCityGuide FoursquareSwarm Friendica Gab Gapo Gettr GNUsocial Hello Hi5 Idka Instagram IGTV IRC-Galleria Kumu Letterboxd LiveJournal Likee MarcoPolo Mastodon MeetMe Meetup MeWe Miaopai micro.blog Minds Mixi Myspace MyWorld Nextdoor Odnoklassniki(OK.ru) Parler Peach Pinterest Pixnet Plurk Qzone Readgeek Renren ShareChat SinaWeibo Slidely Snapchat SNOW Spaces SpotifyGreenroom StudiVZ Tagged Taringa! 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Seealso LargestITcompanies ListoflargestInternetcompanies Category:Internettechnologycompanies vteAndreessenHorowitzFounders MarcAndreessen(co-founder) BenHorowitz(co-founder) SelectedGeneralPartners JohnO'Farrell ScottWeiss JeffJordan PeterJ.Levine ChrisDixon VijayS.Pande MartinCasado SelectedInvestments Airbnb Foursquare Groupon Lytro Twitter ThirdLove Zynga AuthoritycontrolGeneral VIAF 1 WorldCat(viaVIAF) Nationallibraries Norway Germany Israel UnitedStates Retrievedfrom"https://en.wikipedia.org/w/index.php?title=Twitter&oldid=1079262864" Categories:TwitterAmericansocialnetworkingmobileapps2006establishmentsinCalifornia2006inSanFrancisco2013initialpublicofferingsAmericansocialnetworkingwebsitesAndroid(operatingsystem)softwareCompaniesbasedinSanFranciscoCompanieslistedontheNewYorkStockExchangeInternetpropertiesestablishedin2006IOSsoftwareMacOSsoftwareMicrobloggingservicesMultilingualwebsitesProprietarycross-platformsoftwareReal-timewebSocialmediacompaniesoftheUnitedStatesSouthofMarket,SanFranciscoTextmessagingUniversalWindowsPlatformappsWatchOSsoftwareHiddencategories:WebarchivetemplatewaybacklinksPageswithloginrequiredreferencesorsourcesCS1errors:genericnameCS1German-languagesources(de)CS1maint:usesauthorsparameterCS1maint:numericnames:authorslistCS1maint:bot:originalURLstatusunknownCS1Italian-languagesources(it)ArticleswithshortdescriptionShortdescriptionisdifferentfromWikidataWikipediaindefinitelysemi-protectedpagesWikipediaindefinitelymove-protectedpagesGoodarticlesArticlesthatmaybetoolongfromSeptember2021UseAmericanEnglishfromJune2015AllWikipediaarticleswritteninAmericanEnglishUsemdydatesfromFebruary2022Articlescontainingpotentiallydatedstatementsfrom2012AllarticlescontainingpotentiallydatedstatementsArticlescontainingpotentiallydatedstatementsfrom2019Allarticlesthatmayhaveoff-topicsectionsWikipediaarticlesthatmayhaveoff-topicsectionsfromJune2021ArticlestobemergedfromDecember2021AllarticlestobemergedArticlescontainingpotentiallydatedstatementsfrom2009AllarticleswithunsourcedstatementsArticleswithunsourcedstatementsfromFebruary2020AllarticleswithvagueorambiguoustimeVagueorambiguoustimefromAugust2019AllWikipediaarticlesneedingclarificationWikipediaarticlesneedingclarificationfromOctober2019ArticleswithunsourcedstatementsfromOctober2019AllpagesneedingfactualverificationWikipediaarticlesneedingfactualverificationfromSeptember2019WikipediaarticlesinneedofupdatingfromSeptember2019AllWikipediaarticlesinneedofupdatingWikipediaarticlesneedingclarificationfromJuly2020Allarticleswithspecificallymarkedweasel-wordedphrasesArticleswithspecificallymarkedweasel-wordedphrasesfromFebruary2022WikipediaarticlesinneedofupdatingfromFebruary2022ArticlescontainingpotentiallydatedstatementsfromFebruary2022ArticlescontainingpotentiallydatedstatementsfromMarch2014ArticlescontainingJapanese-languagetextArticleswithVIAFidentifiersArticleswithBIBSYSidentifiersArticleswithGNDidentifiersArticleswithJ9UidentifiersArticleswithLCCNidentifiersArticleswithWorldCat-VIAFidentifiers Navigationmenu Personaltools NotloggedinTalkContributionsCreateaccountLogin Namespaces ArticleTalk English Views ReadViewsourceViewhistory More Search Navigation MainpageContentsCurrenteventsRandomarticleAboutWikipediaContactusDonate Contribute HelpLearntoeditCommunityportalRecentchangesUploadfile Tools WhatlinkshereRelatedchangesUploadfileSpecialpagesPermanentlinkPageinformationCitethispageWikidataitem Print/export DownloadasPDFPrintableversion Inotherprojects WikimediaCommonsWikibooksWikinewsWikiquoteWikiversity Languages AcèhAfrikaansAlemannischአማርኛالعربيةAragonésArpetanঅসমীয়াAsturianuAvañe'ẽАварAzərbaycancaتۆرکجهBasaBaliBamanankanবাংলাBanjarBân-lâm-gúБеларускаяБеларуская(тарашкевіца)भोजपुरीBikolCentralBislamaБългарскиBoarischBosanskiBrezhonegCatalàЧӑвашлаČeštinaChi-ChewaCymraegDanskالدارجةDeutschडोटेलीEestiΕλληνικάЭрзяньEspañolEsperantoEuskaraفارسیFøroysktFrançaisFryskGaeilgeGàidhligGalegoگیلکیગુજરાતીगोंयचीकोंकणी/GõychiKonknni客家語/Hak-kâ-ngî한국어HausaՀայերենहिन्दीHrvatskiIlokanoBahasaIndonesiaInterlinguaInterlingueÍslenskaItalianoעבריתJawaKabɩyɛಕನ್ನಡქართულიҚазақшаKiswahiliKurdîКыргызчаລາວLatinaLatviešuLietuviųLimburgsLombardMagyarMadhurâमैथिलीМакедонскиMalagasyമലയാളംमराठीმარგალურიمصرىBahasaMelayuꯃꯤꯇꯩꯂꯣꯟMinangkabauMìng-dĕ̤ng-ngṳ̄Монголမြန်မာဘာသာNederlandsNedersaksiesनेपाली日本語NorskbokmålNorsknynorskOccitanଓଡ଼ିଆOʻzbekcha/ўзбекчаਪੰਜਾਬੀپنجابیپښتوភាសាខ្មែរPolskiPortuguêsQaraqalpaqshaRomânăРусскийСахатылаसंस्कृतम्ᱥᱟᱱᱛᱟᱲᱤScotsShqipSicilianuසිංහලSimpleEnglishسنڌيSlovenčinaSlovenščinaSoomaaligaکوردیСрпски/srpskiSrpskohrvatski/српскохрватскиSundaSuomiSvenskaTagalogதமிழ்Татарча/tatarçaၽႃႇသႃႇတႆးతెలుగుไทยТоҷикӣᏣᎳᎩTürkçeTürkmençeThuɔŋjäŋУкраїнськаاردوئۇيغۇرچە/UyghurcheVènetoVepsänkel’TiếngViệt文言Winaray吴语ייִדיש粵語ZazakiZeêuws中文 Editlinks



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