Use the three-dot More menu and choose Version history.

The right-hand panel will list the Version history of what changed, and by who, on the site and the left will show how the site looked at that version.

Open the version history (see View version history above).

Scroll through the list of versions of your site and find the version of the site you want to restore and revert to.

Above the site preview on the left use the Restore this version button and the site will  restore that version of the site.

Version history retains all the revisions of the site after the version you restored to, so you you do not lose those changes and versions and can revert back to those at any point in time.

Open the version history (see View version history above).

Find the version of your site that contains the deleted content you want to restore.

Use the three-dot button next to the version name/date on the right.

Use the Mahe a copy option to make a copy of the site as it was at that point in time.

You can then copy the deleted content from the version copy to the original site.

Open the version history (see View version history above).

Pick the version of the site you want to name.

Either double-click the date or use the three-dot button and choose Name this version and enter the name you want for that site version.