When editing a user group, you can change its name, and the users assigned to it.
The following steps demonstrate how to edit user groups.
On the main navigation bar, click , the gear icon.
In the dropdown, click Users & Groups.
The Manage Users & Groups interface appears, open on the Users tab.
In the list of user groups, click the name of the user group to edit, or the icon (pencil) on that row.
In the Edit Group modal window, you can change the Group name.
Note that the edited group is part of the Groups list, and you can see both the number of group members, and their usernames.
See Adding Users to User Groups for the many possible ways to add users to groups.