My understanding is that it's part of the rooting process and your boot screen will now have a recovery option (assuming your rom has a recovery.)
I haven't rooted yet so I'm not pro. Thats just he jist of my understanding of it from lurking around.
Edit -This may help:
http://forum.ppcgeeks.com/showthread.php?t=95753 (It's for the hero, but covers the basics pretty good.)