Google Analytics 4 (GA4)

Connect GA4 for sessions, users, engagement and traffic-channel data.

What GA4 gives you#

Once connected, metricsKit pulls on-site behaviour data from the GA4 Data API into the overview, visitors and channel reports:

Core metrics: sessions, users, pageviews, engagement rate, average engagement time
Breakdowns by country, device category, default channel group and landing page
Realtime report: active users and events from the last 30 minutes
The measurement ID (G-XXXXXXXXXX) is captured automatically for GTM event configuration and ecommerce attribution

Note: GA4 data is processed with a 24-48h delay; the realtime report is the exception (visible within minutes).

Note: GA4 uses read-only access (analytics.readonly) — metricsKit never writes to or modifies your Analytics data.

Console → Data sources, start Google authorization with GA4 checked.
metricsKit lists the GA4 accounts and properties via the Admin API; a unique domain match binds automatically, otherwise pick in Settings.
After binding, if the property has exactly one web data stream its measurement ID (G-XXXX) is saved automatically; with multiple streams you can pick one.
Reports start populating within about 5-30 minutes.

Situation	What happens
Unique property + unique stream	Property binds automatically and the measurement ID is saved
Multiple matching properties	Manual pick in Settings — never guessed
No property selected	Reports prompt "no GA4 data object selected"

403 accessNotConfigured / SERVICE_DISABLED: the Google Cloud project behind the OAuth client has not enabled the Analytics Admin API or Data API — enable it in the GCP project and retry.
"No property bound": pick the GA4 property in Settings.
invalid_grant: re-authorize from the Google API page.

Tip: Connect GA4 and GSC together: GA4 shows on-site behaviour, GSC shows search demand, and joining them on sessions gives the full journey.