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name: common-metric-names description: "The correct GA4 Data API names for fields models most often get wrong. Use these before calling get_ga4_data — wrong names return a hard error."

Common Metric & Dimension Names

The correct GA4 Data API names for fields models most often get wrong. Use these before calling get_ga4_data — wrong names return a hard error.

⚠️ YOUR TRAINING DATA IS OUTDATED: Universal Analytics was sunset 2023-07-01, and on 2024-05-06 Google Analytics 4 renamed all conversion metrics to "key events" (conversions → keyEvents, conversionRate → sessionKeyEventRate). Querying conversions will fail with an Invalid metric error. Always use keyEvents.

Metrics — correct API names

What you mean	Wrong (will fail)	Correct API name
Goal completions / conversions (RENAMED 2024)	conversions, goals, conversion	keyEvents
Total users	users, totalVisitors	totalUsers
Active users (rolling 30-day ≈ MAU)	MAU, monthlyActiveUsers, activeVisitors	active28DayUsers
Active users (rolling 7-day ≈ WAU)	WAU, weeklyActiveUsers	active7DayUsers
Active users (rolling 1-day ≈ DAU)	DAU, dailyActiveUsers	active1DayUsers
Distinct users in the queried range	uniqueUsers	activeUsers
Page views	pageViews, pageviews, page_views	screenPageViews
E-commerce purchases	purchases, transactions	ecommercePurchases
Product views	itemViews, productViews	itemsViewed
Items added to cart	addToCarts, cartAdds	itemsAddedToCart
Revenue	revenue, ecommerceRevenue	purchaseRevenue
Avg session duration	avgSessionDuration, avgTimeOnSite	averageSessionDuration
Total engagement time	engagementDuration, timeOnSite	userEngagementDuration
Session key event rate (was "conversion rate", renamed 2024)	conversionRate, goalConversionRate, sessionConversionRate	sessionKeyEventRate
User key event rate	userConversionRate	userKeyEventRate
Engaged sessions	qualifiedSessions, validSessions	engagedSessions
Pages per session	pagesPerSession, pageDepth	screenPageViewsPerSession

Dimensions — correct API names

What you mean	Wrong (will fail)	Correct API name
Traffic channel group	sessionDefaultChannelGrouping, channelGrouping	sessionDefaultChannelGroup
Landing page + query	landingPage (often wrong scope)	landingPagePlusQueryString
Page path	pagePath, page	pagePath
Page path + query	pagePathPlusQueryString	unifiedPagePathScreen
Session source	source (wrong scope — see attribution-scope skill)	sessionSource
Session medium	medium (wrong scope)	sessionMedium
Device type	device, deviceType	deviceCategory
Operating system	os	operatingSystem
Browser	userAgent	browser
Week of year	week, weekNumber	week (this one IS correct)

Note on active users (MAU / WAU / DAU)

GA4 has no MAU, WAU, DAU, monthlyActiveUsers, or dailyActiveUsers metric — these hard-error. Use the rolling n-day metrics: active1DayUsers (≈ DAU), active7DayUsers (≈ WAU), active28DayUsers (≈ MAU). Each counts distinct users active in the N days ending on that date (a rolling window, not a calendar bucket). activeUsers = distinct users in the queried range. Never sum daily activeUsers across rows to get a period total — it double-counts users active on multiple days. For a monthly total, query activeUsers once over the whole range (no date dimension), or use active28DayUsers for a rolling month. Stickiness ratios dauPerMau, dauPerWau, wauPerMau are also available as metrics.

Note on bounce rate

GA4 bounce rate = sessions with NO engaged session (opposite of GA3 logic). A bounce rate of 60% means 60% of sessions had no engagement — that is high. In GA3, bounce rate meant single-page sessions. Do not compare GA3 and GA4 bounce rates.

When you hit a schema error

If get_ga4_data returns "Invalid dimension" or "Invalid metric", do not guess alternatives. Use search_schema with a keyword to find the correct name, or check this skill's table above.