This handy guide, by the folks at Shoryuken, should help. You'll especially want to check out the "What on Earth are you talking about?" section down the bottom, which is a glossary explaining what "hype", "salty" and "bodied" - terms you'll probably hear a lot of for the rest of the day - actually mean.
Don't forget, you can catch all the action live right here.
How to Watch Evo 2013 [SRK]