Alright, now I understand the purpose. The reason I asked is because I keep getting followers and I didn't know what it meant. So, how do you follow somebody. I'm sure there is a button for it, but where is it? Never seen it.
It's kind of like GaG's version of Twitter's followers, aka you have fans or people that are interested in what you have to say, or in some cases, stalkers. But to follow a user, just highlight their username, and in between 'friend' and 'block' there will be an option to follow that user. When you do this, it appears as though you've gotten a friend request, but they're following you instead. If you don't want it, just block them to cancel that.
I'm not 100% sure, but I believe it means they more than likely enjoy your questions and/or answers and they receive updates on questions you ask and answers you post? I had a bunch of followers but I removed a few by blocking and unblocking them and left 1, since he's harmless and I see him around