Just to make it simple, I’m going to use a K though M+ rating system so you have a decent idea of what kind of story you’re about to read.

K – Safe for everyone to read

K+ – Should be kept to older kids, maybe 8 or 9 and up

T – Good for teens and up, starting aroun 12 or so

M – It’s getting a little rougher with this rating, probably best for 16 and up

M+ – This is best left to the legal adults, 18 and up

I’m sure you can figure out what kind of content you’re getting with those ratings.  There are also two different statuses a story can have; in progress and complete.  That’s self-explanatory enough, don’t you think?