Is a group the same thing as a supporters group?

To join a group, go to a group and click Join Group in the top-right corner.
Depending on the group's settings, you may have to wait for a group admin to approve your request.
Keep in mind when you join a group:
  + People may see when you join a public or closed group or that you're a member of that group, like in News Feed or search.
  + When someone adds you to a public or closed group, others may see that you've been invited (ex: in News Feed or search). Once you visit a group you're invited to, you'll become a member and other people may see you joined.
  + Certain groups on Planet Ultras have their view setting set to private and may not appear in search results. You can see them once a group member adds you.

You can join as many groups as you want to on Planet Ultras!

Yes!  Click on Groups and "Create a New Group" button in the upper right corner.  You can choose the group type:

• Public - anyone can join and view
• Private - only Administrators can add members.  It is not viewable to the public.
• Restricted - anyone can request to join, but membership must be approved by a group administrator.

You may also upload "profile" photo for your group.