Cloud Computing- What the heck is it?

I've found myself searching the web and trying to find something worth while to post on here about Cloud Computing. I keep hearing about it, but I don't have a good grasp of what it is exactly , what it will do for me, and how to use it. So in this post I'm asking you to post any links you may have found helpful on this topic. I'm willing to check them all out... so let the copying and pasting fly!

Hope you all had a good weekend!

Thanks!
Sarah