offense

OK I know some people are gonna scratch their heads by me asking this, and it's probably gonna be a dump question, and maybe I'm missing something that is way too obvious, but I still feel I gotta ask this question, due to some information I got over the past several weeks, so please hear me...

It's an interesting concept that I did not fully grasp, I wanted to share Juicebox's explanation for those of you interested in learning this as well. Skip to 1:59 for the good stuff.