What are "Main groups" used for and how do I choose them?
"Main groups" are used so you can focus on the people most important to you.
1. When accessing pages List, Photos, Videos you will only see items related to members of this group, although, you will be able to see activity from members of other group at any time
2. Notifications that are sent to you will only come from people that are part of this group
To choose "Main groups" you must go to "Settings" and click on the "Groups" tab and select your favorite group.