When you turn on Google Chrome's sync feature, it will save data about all your bookmarks, extensions, themes, search history, open tabs, saved passwords, payment info, addresses, phone numbers, settings, preferences, and more. You can also customize what data you do want to sync and what you don't.

To back up and synchronize Gmail, Calendar, and Contacts Tap Settings > Accounts. If there is no Google account yet, tap Add account. Tap the Automatically sync data switch to enable the function.

If you've decided to turn off sync in your Chrome web browser because you're concerned about Google collecting your data, it's not going to help much, as turning off sync does nothing to prevent your data being collected. The only way to limit the data Google collects is using a VPN.

Account sync operation is the process through which target account attributes and permissions are synchronized with Verify users and permissions. If provisioning is enabled and supported by the target, Account Sync settings can be configured.