The communities you belong to are also a part of your identity and can help your verification on BrightID. The groups represent communities on BrightID.
You can start creating a group by selecting a picture and a name of your choosing. You will then need to select two other co-founders. Only the three of you have the ability to invite others to the group or remove existing members.
How to invite other user to your group
The group is practically created after co-founders accept the invitation and join. You can invite more people to groups but only if they are connected to more than half of the existing members.
You receive notifications for the groups you are invited to and can review them in the notification page. Invitations expire after 2 days.