If you turn off sync, you can still see your bookmarks, history, passwords, and other settings on your computer. If you make any changes, they won't be saved to your Google Account and synced to your other devices. When you turn off sync, you'll also be signed out of other Google services, like Gmail.

Should I keep auto sync on or off?

Turning off auto syncing for Google's services will save some battery life. In the background, Google's services talk and sync up to the cloud. ... This will also save some battery life.

Is it good to turn on sync?

If you are using Enpass on multiple devices, then we recommend enabling sync to keep your database updated across all your devices. Once enabled, Enpass will automatically take a backup of your data with the latest changes on the cloud which you can restore anytime on any device; thus lowering the risk of losing data.