When I go to my bio/profile, it says I'm not a member of any public groups. Curious, I clicked on about seven thousand other member profiles, and nobody else seems to be a member of a public group, either.
Sooooo, what, exactly, is a public group, and since nobody seems real eager to belong to one, why is the feature there?
I'm losing sleep over this, and I'm off my feed. Please help.