When creating a group, you'll be asked to select a Group State. A group can be Open, Closed, or Closed Hidden.
An open state will allow the group to be visible and open for everyone to join. They do not necessarily have to be a registered member with the club to join the group. This will allow you to create an open forum for members and supporters alike.
A closed state will require members to be added by the administrator, or the member themselves can request to join through the App. The Admin will have to verify these requests before they can join the group. This group state will be ideal for creating team groups for managers and players.
Closed hidden groups will not appear on the App and will only be available to members added by the administrator. These groups will cater to committee level groups within a club for example or Team Groups where you have the only say over who is added to the Group.