Pinned topics and a help area

Just wondering what it means if a topic is "pinned"? Also is there a help area to figure out the nuances of the forum? I looked at the initial welcome one but find I'm having more questions than are answered there. Thanks!

"Pinned" means they are stuck at the top of the category, so they'll always be visible and easily accessed without getting lost down in the list of topics. I agree some kind of tutorial or FAQ would be really helpful! Someplace to get all the "how-to" and "what does this do" questions answered all in one place. I haven't found anything like that, though that doesn't mean it's not out there somewhere!

Thanks! That's what I was looking for. A help button at the top would be great!