What does "Backup" backup?

Can anyone confirm if addon's and their settings are kept by the backup?

I did look at the wiki, but wasn't clear on the answer.

Quote

Create System and Kodi Backup:

Create a tar archive containing all LibreELEC and Kodi configuration settings, databases and thumbnail content. Backup files will be stored in /storage/backups.

Thanks, it's a little move obvious once you actually run it, as you can see it rattling through the add-on data.