I have been playing for about two and a half years and have already advanced to playing Yngwie Malmsteen and similar stuff (yes i have a lot of spare time and nothing to do with it), but I'm self taught and have no clue what music theory is. I just wanted to ask if anyone here could help me out and maybe try to explain it to me or post a link to an earlier post on this same subject. I'm grateful for any help any of you could provide.

By the way i have a book on scales but i have no idea what the stuff in it means, it's description of music theory isn't quite as lucid as i had hoped for but it still contains many scales i just need to understand how to utilize them.