Klar uses GA4 session data to populate session-based metrics in the Marketing Flex Table — including Sessions, CVR (Conversion Rate), CPS (Cost per Session), and RPS (Revenue per Session). Without GA4 connected, these metrics will show no data.
What you need before starting:
A Google Analytics 4 property (not Universal Analytics)
A Google account with at least Viewer access to that GA4 property
Step 1: Find your GA4 Property ID
Go to analytics.google.com and log in with the Google account you want to connect to Klar
Click Admin (bottom left)
Under the Property column, click Property Details
Your Property ID is displayed in the top right — it's a numeric ID (e.g.
123456789)
Copy the Property ID
Step 2: Connect GA4 in Klar
In Klar, go to Store Configurator → Data Sources
Click Add Data Source → Add New Data Source
Select Google Analytics 4
Enter a name for the datasource and paste your Property ID
Click Connect and authenticate with your Google account
Grant Klar the requested permissions to read your GA4 data
What happens next?
Session data from GA4 will appear in your Marketing Flex Table from the next data sync. Historical session data is pulled from the date your GA4 property was created.
⚠️ Make sure your GA4 property has UTM tracking set up correctly. Klar matches GA4 session data to your marketing channels based on UTM parameters — if your ad links aren't tagged with UTMs, sessions will appear as direct or unattributed traffic.