Every profile has an Activity Feed or "Recent Changes" section. This displays the changes related to that profile.
This is a shortened version of the history tracking that is essential for all wikis.
On your personal home page you see a feed that combines changes to all the people, places, and things in your Watchlist. This enables you to easily track the activity on pages that you care about. If someone adds a photo of your sister, you see it. If someone edits the description of your neighborhood, you know about it.
You can also view a "Contributions" feed that displays the changes made by a particular WikiTree user. To access this, click on the "Changes" tab on a profile and then select the "contributions" link at the top.