This may seem like a lame quetion but. . . What does it mean when a group is open or closed?

4.4.2.4: Group Types (Open, Hidden, Closed)
Group types may be changed by the group moderator or a board administrator in the Group Control Panel. They may also be changed by board administrators in the Group Management section of the admin panel. For more information, see 3.3 Group Administration.

Open - All users may see the group and group members. Users may request membership to this group. For more information, see 4.4.1 Joining a Group.

Closed - All users may see the group and group members. Users may not request membership to the group, but may be added by the group moderator.

Hidden - The group and its members are not visible to normal users. Users may be added by the group moderator. If a hidden group is moderator of a forum, the group will show up in the Moderators list.

ok, thanks. I was making a staff group. thanks