Your account may have two types of administrators, Site and Account.
A site administrator can create and manage administrators for the site. This includes managing what permissions and Roles account administrators should be assigned. Site administrators are the only administrators with access to edit or create Roles for the account. They are also the point of contact for the site, and accounts that belong to that site.
An account administrator, depending on what Role is assigned, will have limited access to certain Dashboards and functions within the account.