^That little blue/green guy next to a forum indicates that there are UNREAD posts in that section for you to look at. If you want to clear it, just click the guy and he vanishes. When he reappears on a forum, you know there is something your account has not yet viewed. (this only applies to our primary 2014G layout)

The same goes for the tiny bright blue dots that are next to the smaller sub-forums such as in the roster area. You can click those blue dots to mark that sub-section as "read" by your account, etc...

And lastly there is a "mark all forums read" link at the very bottom of our index if you want to clear them all in one shot.