Sign in to https://analytics.google.com
Create an account if you don't have one
Create a property. You could use https://chrome.google.com as a domain.
4. Get a Tracking ID from Google Analytics admin console
5. Put the tracking id to Webstore listing field "Google Analytics ID"
6. You will start getting Google Analytics data soon.
In order to connect your extension Google Analytics you should provide read-only access to Extpose service account
You can follow step-by-step guide here https://support.google.com/analytics/answer/2884495?hl=en
Or use the following instructions:
Go to Admin panel
Select a View corresponding to your extension(s).
Add a user with read-only access
After granting rights to read the data Extpose will populate conversion statistics.