How can you keep track of changes to page content over time? Page versions are the answer. Concrete CMS features a built-in version control system which keeps a copy of the page each time it is published along with details such as who made the changes and when. You can use this version history to compare versions, revert a page to a previous version, or even make a new page starting from a copy of a previous version. The Versions page of the Editors Reference contains a video demonstrating the basic usage of the versioning system.