I looked at my profile and under the category: "group memberships"
it says that I am not a member of any public groups. I would like to know what does that mean? How do I become a member?

Thanks!!
:wave:

If the administrator has set up any groups, you can join them from the User CP.

I don't see a link for Group Memberships in it so I guess there are none. It's just a feature of vBulletin. ;)

it's a vbulletin feature that's not enabled here.