Revisions in Guides allow you to easily and quickly switch to a previous version of an article that you were happy with. It acts as a built-in backup for every change made to an article.
Viewing the Revision History for an Article
Find the article in the control panel.
Select the Revision History tab at the top section of the article editor.
You will see a list of all the revisions made to the article.
Click the View button next to any revision to see its content.
Restoring a Revision of an Article
Click the Restore button next to the revision you want to restore.
The restored revision will become the active version, highlighted in the list, and the Restore button will be disabled for that revision.
Navigate back to the Edit Article tab to see the article restored to the selected revision.