It refers to using the proper Progressive Edge technique. When done correctly you will have your strongest edge as you leave the wake and will have effectively "loaded the line". Do a search for Progressive Edge and you will find an extensive description on how to do it correctly. Learn that and the possibilties of wakeboarding will open up in front of you.
its about building energy man. and then transferring it thru your board. you gotta fly like an eagle, Marc. you got this. you seen any dv's yet man? like detention, waketrix,the book? good stuff.