There's normal rocker, every company has a different name for it but pretty much all the same idea. It's only useful as a pure park/pow board imo. Then there's rocker and camber combined, almost every company has their own variation of it and call it something different. They're designed to give you the benefits of both worlds, all of them ride differently and which one is better is up to the person riding it. But the idea behind all of them is to give you the float of rocker with the edge control of camber.