This deletes your account and any fleet you're the only owner of, with its machines, service records and photos, from our servers. People you shared those fleets with lose access to them. Fleets someone else also owns are kept. This can't be undone.
Machines saved on your phone are not affected. To keep a copy first, use Account, Save a backup file in the app. You can also delete your account in the app: Account, Delete account.