Our CMS (Content Management System) content types have a Revision feature. This means that each time you save and close, the previous version of the page is saved online. This feature allows you to view a previous page or re-publish the page in place of the current live page.
To view the list of available saved pages click on the Revision tab next to the Edit tab. Depending upon the number of times the webpage has been updated you will see a listing of all previous versions of the webpage. Clicking on the date and time list in the left column will allow you to view the version of the webpage as it existed at that time.
If you have Site Admin level access you have the option of reverting the page from the current live website to the desired previous revision. If you don't have that level of permissions then have your Site Admin revert to the desired page.
The current live page is not deleted. It becomes another revision of the webpage.