The Profile Change Log is an audit trail of any changes that are made to the standard fields on a profile.
Video tutorial: Viewing the profile change log
First, search for the relevant profile.
On the profile dashboard, the change log appears on the bottom right side of the screen.
You can view a more detailed change log by clicking on the arrow button in the top right.
This detailed view allows you to see more more information about when and what changes have been made as well as search for a specific record change.