What is a public group?

[H Birchgrove]

When I look at some posters' profiles, I see this "[Poster's user name] is not a member of any public groups".

(I haven't yet seen a profile in which it's stated that the poster is a member of a public group.)

But what is a public group? How do you become a member of one, if you wanted to?

[Zherog]

This forum doesn't make use of that feature.

In general, the "group" feature allows for more control over who accesses what content. For example, an admin could define a "Zherog's Forum" and then add me and you to that group, and only you and I could post there. I believe there's a few other things group access can control, such as size of PM inbox. Generally speaking, nothing super-exciting.

[Rawhide]

There are no public groups. Therefore, you won't find anyone who is a member of a public group.