Should I get a facebook account?

[Nameless]

Hey, guys!!

So, my Mom and my friend are pushing me to get a Facebook, and I don't really want one, but I guess it'd be kinda fun. My step dad is totally against it, and I kind of am too, but I decided that because I don't know much about Facebook, I shouldn't decide whether or not I am against it. So, before I make up my mind, I decided I'd get a few pros and cons about Facebook, and also figure out how it works, etc. So, can you guys help me out with this? What are the pros and cons of having a Facebook account? How does it work? What's it for? What can you do on Facebook?

Thanks, all!!