Exactly what is it for? Roleplaying and roleplay logs. Need an explanation? Here you go:
1] Let's say you roleplayed your character with another person within this community playing their character. Don't exit the window so quickly after you finish. Post your entire roleplay or just portions in here! Remember to use cut-tags with appropriate subjects. Replace screennames with character names and bold them. This is a way for people to keep up with what's going on in the lives of your characters, but if you want no remarks on it, say so.
2] So, you want to post a roleplay entry in here to hold a roleplay? Great. Post your start, and the comments of other players will be the continuation of the roleplay. It may sound a tad difficult to understand, so if you have any questions, IM me at toujours pur JB. I'll be more than happy to explain.