I hit it and it disappears. Does it just clear your notifications; accepting that you have been duly notified? That's my guess.
At one time I think you had to "follow" someone before something (pm's?) would be allowed? A little memory is stuck in my head about that ---- although it could just be gum!
YoungAtHeart I think I remember something like that too but it would make no sense...what if they didn't want to follow YOU? LOL.
I hit it and it disappears. Does it just clear your notifications; accepting that you have been duly notified? That's my guess.