Whenever a page is edited and then the page has a few minutes of inactivity, a snapshot of that page is saved to the page's version history. If you want to, the page history feature allows you to restore the state of the page to a previous version.
How to Access the Page History Feature
Click on the three-dot menu icon for the page that you want to see the history of.
Then select the “Page history” option.
How to Restore a Page to a Previous Version
Select the snapshot/version that you want to restore the page to.
Then click the “Restore version” button at the bottom of the snapshot list.
