[GA4] Scopes for traffic-source dimensions - Analytics Help

Event-scoped dimensions don't include a prefix (e.g., the Source dimension). The source and medium for non-conversion events are categorized as "(not set)". Skiptomaincontent[GA4]Scopesfortraffic-sourcedimensionsUnderstandtheprefixesintraffic-sourcedimensionsSomedimensionsincludetheprefix"Firstuser"or"Session".Forexample,insteadofseeingtheSourcedimension,youmightseetheFirstusersourceorSessionsourcedimension.Thisarticleexplainsthescopesoftraffic-sourcedimensionssoyoucanunderstandthedataforeachdimension. Aboutusers,sessions,andevents GoogleAnalyticsorganizesusers,sessions,andeventsinahierarchy: User Session Event Auserisanindividualwhointeractswithyourwebsiteorapp.Iftwodifferentpeople,AhmedandBetty,interactwithyourwebsite,GoogleAnalyticsconsiderseachofthemasaseparateuser.Ifauserleavesyoursiteandcomesbacklater,forexample,GoogleAnalyticsstillconsidersthemasoneuser. Asessionistheperiodfromwhenauservisitsyourwebsiteorapptowhentheyleaveyourwebsiteorapp.Forexample,Ahmedvisitsyoursite,addsanitemtotheircart,andthenleavesyoursite.Thenextday,Ahmedreturnstoyoursiteandpurchasesanitem.Thesewouldbeconsideredtwoseparatesessions. Aneventisaspecificinteractionwithinasession.Inthepreviousexample,addinganitemtoacart,leavinganecommercestore,andpurchasinganitemareallexamplesofevents.Youcanmarktheeventsthataremostimportanttoyourbusinessasconversionevents. Aboutscopes GoogleAnalyticsprovidesthefollowingdimensionscopesthathelpyouunderstandhowauser,session,orconversioneventwasacquired: User-scopeddimensions Session-scopeddimensions Event-scopeddimensions User-scopeddimensions User-scopeddimensionsprovideinformationaboutnewusers.Newusersareuserswhohave0previousinteractionswithawebsiteorapp.Dimensionswiththeprefix"Firstuser"provideinformationabouthowtheuserwasfirstacquired.Iftheuserreturnsmanymoretimesinthefuture,theiruser-scopeddimensionswon'tchange. Example:TheFirstuserdefaultchannelgroupingdimensioncapturesthedifferentchannelgroupingsassociatedwithauser'sfirstvisit.IfauservisitedyourwebsiteinJanuaryandthenagaininApril,thevalueassignedtothedimensioninAprilwillbethesamevalueassignedinJanuary. Session-scopeddimensions Session-scopeddimensionsprovideinformationaboutnewsessions.Newsessionsaresessions fromnewandreturningusers.Dimensionswiththeprefix"Session"showinformationaboutnewsessions.Eachtimeauservisitsyoursite,they'reassignednewsession-scopeddimensionsthatprovideinformationonhowyouacquiredtheuserforthatsession. Example:TheSessiondefaultchannelgroupingdimensioncapturesthedifferentchannelgroupingsassociatedwithauser'smostrecentsession.IfauservisitedyourwebsiteinJanuaryandthenagaininApril,thevalueassignedtothedimensioninAprilwillbedifferentfromtheoneassignedinJanuary. Event-scopeddimensions Event-scopeddimensionsprovideinformationaboutwhatledausertostartanewsessioninwhichtheyperformedaconversionaction(e.g.,purchase).Event-scopeddimensionsdon'tincludeaprefix(e.g.,theSourcedimension).Thesourceandmediumfornon-conversioneventsarecategorizedas"(notset)". Example:TheDefaultchannelgroupingdimensioncapturesthedifferentchannelgroupingsassociatedwithauser'ssessioninwhichtheymadeaconversionevent(e.g.,purchase).IfauservisitedyourwebsiteinJanuaryandthenagaininApriltopurchaseaproduct,thevalueassignedtothedimensionwillbeabouthowyouacquiredtheuserwhentheymadethepurchase. HowAnalyticsattributescredit GoogleAnalyticsusesdifferentattributionmodelstoassigncredittotheads,clicks,andotherinteractionsalongauser'spathtolandingonyourwebsiteandcompletingaconversionaction. Foruser-scopedandsession-scopeddimensions,theattributionmodelisthecross-channellastclickattributionmodel.User-scopedandsession-scopedtrafficdimensionsareunaffectedbychangestotheattributionmodel. Forevent-scopeddimensions,theattributionmodeliswhateveryouselectinAttributionSettings.ChangestotheattributionmodelinAttributionSettingsarereflectedinallreportswithevent-scopedtrafficdimensions.Forexample,changingthereportingattributionmodelchangesthesourceandmediumfortheadd_to_carteventinallreports. Example ExampleOrganizationisanonlineretailerthatsellshardwareproducts.AcustomernamedSamviewsaYouTubeadforExampleOrganization'secommercestore,visitstheirwebsite,viewsafewoftheirproducts,andthensignsupfortheirnewsletter.Afewdayslater,SamclicksaShoppingad,returnstothesite,andcompletesapurchase.ThefollowingimageillustratesSam'spathtoconversion.  Ifyou'vesettheattributionsettingstocross-channellastclick,inthefirstsession: Firstusersource/mediumis"youtube/cpc" Sessionsource/mediumis"youtube/cpc" Source/mediumfortheconversioneventis"youtube/cpc" Inthesecondsession: Firstusersource/mediumis"youtube/cpc" Sessionsource/mediumis"google/cpc" Source/mediumfortheconversioneventis"google/cpc" Wasthishelpful?Howcanweimproveit?YesNoSubmittrueDimensionsandmetrics[GA4]Dimensionsandmetrics[GA4]Customdimensionsandmetrics[GA4]Predefineduserdimensions[GA4]Aboutsessions[GA4]Userengagement[GA4]Traffic-sourcedimensions,manualtagging,andauto-tagging[GA4]Scopesfortraffic-sourcedimensions[GA4]Campaignsandtrafficsources[GA4]Defaultchannelgrouping[GA4]Contentgrouping[GA4]Differencesinusercounts[GA4]Cookieusageonwebsites[GA4]EntrancesandExits[GA4]CurrencyreferenceSearchClearsearchClosesearchGoogleappsMainmenuSearchHelpCentertrue69256false