Community Groups Visibility Settings
Feature Purpose:
This setting determines whether or not a particular group is visible to different sets of users in accordance with the group admin’s preferences.
Working with this Feature:
The different visibility options are shown below and are part of the group creation process

Visible to everyone – any user can see the group
Visible to – only users of chosen categories can find/see the group. System categories such as visitors, exhibitors, team members, speakers can also be selected.
Troubleshooting:
Empty “Visible to“ means no one will be able to see the group except admin users.