HOUSEWIFE AWESOMENESS: SELF CLEANING OVEN!

So I am not a master of all things house oriented.  I recently purchased a home and I have a oven.  It bakes stuff.  Mostly hot pockets and pop tarts. Or Hot Pocket Pop Tart Sandwiches.

But this thing has a self cleaning mode.  Where it just locks itself and gets really hot.

What the fuck is the difference between self cleaning mode and cooking mode?

Bye.