In settings, you can add, remove, or edit tags.
To add a tag, tap the plus sign in the upper right.
To delete a tag, swipe left on the tag to delete
To change a tag, swipe left on the tag to edit.
This is a premium feature that allows you to automatically sync notes to a third-party cloud provider of choice.
It's one-way syncing which is more of a backup of what you've captured.