The main body of the Admin page displays User Data and Group Data. Site Administrators get a quick snapshot of how many Users have access to the site, how many locked Users there are, and the current number of Groups within the site along with the number of users in each group.
It is vital that a Site Administrator fully understands the importance of each component on the Admin page. Careful attention is particularly important when setting up first time Users, Groups, Group Saved Searches, and Alerts. For example, Users cannot be created before Groups and Group creation is an essential security component.