what doees this mean?

[Sammorra]

okay, im still "new" here. and i would like to know.
on the side of a post.
there is a tite of blahblahblahdeblah
anyways, before the tite there is a paper, and before that is a folder.
why is it on fire?
whats that mean?
i am sorry to ask this but i am not tech-savvy at all.

[Monster]

It just means it's a "Hot Topic", or just a thread that has more than one page or replies to it. 'Tis all.