Connecting Google
Connecting Google lets Radar read Google Analytics (sessions, landing pages and conversions, for your hub pages and your site) and Google Postmaster Tools (how Gmail sees your sending domain). It is read only: mxAURA never changes anything in Google.
Connect with Google
Open Settings, Integrations and press Connect with Google. Google's own sign-in opens in a small window and asks for read-only access to Analytics and Postmaster. When it closes, press Choose property and pick the GA4 property Radar should read. The account you sign in with needs at least Viewer access to that property.
Use a service account instead
Some teams prefer a service account to a person's sign-in. Add the service account's email as a Viewer on the GA4 property, then press Use a service account and paste its JSON key with the property number. The key is stored sealed. A service account covers Analytics only: Postmaster Tools accepts people, not service accounts.
Postmaster Tools
Postmaster only has data for domains that are verified in Postmaster Tools by someone with access to the domain, and only once the domain sends enough to Gmail each day. Radar says so when there is no data rather than showing zeros.
Disconnect
Disconnect removes the connection from mxAURA at once. To revoke it on Google's side too, remove mxAURA under your Google account, Security, Third-party access.