GA4 Dimensions & Metrics Explorer

Hostname hostName

The host portion of the URL.

Type
Dimension
Scope
Event
Category
Page / Screen
API name
hostName

Compatibility

Likely compatible (scope-based estimate — run fetch_metadata.py for Google's exact matrix):

DatedateDay of weekdayOfWeekHourhourCountrycountryCitycityDevice categorydeviceCategoryOperating systemoperatingSystemBrowserbrowserLanguagelanguageSession default channel groupsessionDefaultChannelGroupSession sourcesessionSourceSession mediumsessionMediumSession source / mediumsessionSourceMediumSession campaignsessionCampaignNameFirst user default channel groupfirstUserDefaultChannelGroupPage pathpagePathPage path + query stringpagePathPlusQueryStringPage titlepageTitleLanding pagelandingPageEvent nameeventNameNew / returningnewVsReturningAudience nameaudienceNameActive usersactiveUsersNew usersnewUsersTotal userstotalUsersSessionssessionsEngaged sessionsengagedSessionsEngagement rateengagementRateAverage session durationaverageSessionDurationBounce ratebounceRateViewsscreenPageViewsViews per sessionscreenPageViewsPerSessionEvent counteventCountEvent count per usereventCountPerUserConversionsconversionsKey eventskeyEventsUser engagementuserEngagementDurationTotal revenuetotalRevenueTransactionstransactions

Watch out combining it with: Cohort, Cohort nth day — these can raise incompatible dimensions and metrics.