Auditing
Audit allows you to run reports to see exactly what has been going on with the site and who has been using it in which way.

You can search for audit entries using four distinct logs.

To use the Audit function, click Audit in the left tree view of the Administrator section.
To access the Thru Audit feature, users must first be added to the Audit Group.
Visit Adding User to Groups to learn how to add users to groups.