PLEASE TELL ME ABOUT YG ENTERTAINMENT?

Hey, I'm an Asian and I'm 16. I'm thinking about auditioning to YG but I think I only can send in an email. So, when do I send it? Whenever I want? Or only by the global audition time? Also, if you know information about YG, please tell me. P.S. I know they choose very talented people!! I know it's hard, okay.