You signin with your Google Account, and then it's a Nostr Relay that saves your events to Google Drive so you have a backup copy of them.

If you have a copy of your events, you can import them into Nostr apps and restore them to relays in case of failure.

Its basically a low barrier of entry way for the average user to backup their own data using a familiar tool and account they probably already have.

seems like 1 click KYC for your npub