Um, kind of what it says. It's like leaving a message on your wall on Facebook I guess? 
Also, people who are not citizens yet (I think) can't use Private Messages, but if they need to ask someone a question, that isn't in a thread, they can use this instead!
Also, people who are not citizens yet (I think) can't use Private Messages, but if they need to ask someone a question, that isn't in a thread, they can use this instead!
It looks like you're settling in well. Let me know if you have any questions or want to chat. We're all very friendly here.