These Reports are only available if you have Web Monitor installed.
I want to find out which Web sites a user has been visiting.
The Web Activity Detailed Report monitors the activity of one user (or a small group of users) on the Web. The Report details the user that made the request, the URL that was requested, the computer used to make the request, the date the request was sent and the content type. In addition, by clicking the Show Details link, you can also view the Client IP, the Status and the Size.
I want to discover if the same Web sites are continually being accessed.
The Web Activity Summary Report provides a summary of the number of requests to each Web domain. If required, you can filter on Users or Computers. The Report details the user that made the request, the computer used to make the request, the domain that the request was sent to, and the number of requests to the domain.