In the My Account > User logs tab, administrators can view:
All events are logged, including user activities and system activities, such as when maintenance runs. The timestamp of each event is recorded and all user activities are associated with the users that performed them.
The audit trail is visible only to users with an administrator or manager role. You can filter the log for a specific advertiser or website, or for a particular day or period. A summary of the user log activities is provided in the Audit trail widget on the Home page.