configuration in All of The Pool

The sub-group permissioning is really powerful.  The 4 types of sub groups are:

1. Private - this is an invite only option where you want to have discussions in private and members need to be invited/approved to join. 
2. Public - this is an open group that anyone in the community can join.  The only thing to consider here is that the user must take the step to join the group.  They either do this when they initially join the community or search sub-groups.  If you have lots of groups within the community that are open, this is the best option