Your website is backed up as part of normal server operations. These backups are intended for disaster recovery purposes.
What Backups Are For
Backups are meant to help recover a website in the event of major problems such as data loss, corruption, or other serious issues.
Important Limitation
Backups should not be treated as a substitute for careful editing.
Not every minor mistake should be assumed to be instantly reversible, and backup restoration is not intended to function like an undo button for routine edits.
Recommended Practice
If you plan to make major structural changes to your website, contact support first so appropriate precautions can be taken.