If you create a group, you will be the admin of the group. Admins have the ability to promote other members to admin status. To do this access the group by logging in through the Web App.
The Group Admin is the administrator of the group. They have the ability to view and access every player account in the group as well as add, create or move any players. The Group Admin also has the ability to edit the group itself such as changing the group name and description or the privacy features.