So pop is how much spring a board has when you're doing an Ollie or bending your board. It's how strong your board will pop back. Some people just like the feel of a board with a lot of pop due to its responsiveness and for going off jumps and stuff. As for board types, all mountain/Freeride boards are for general purpose riding and are usually longer/stiffer than park boards. A longer board is better for high speeds and riding in powder, but a shorter board with softer flex is better for park/freestyle riding because it's easier to maneuver for rails and stuff. The flex of a board is important when determining what it should be used for as well. I think your board is an all mountain board. Good luck with the new gear.
Board - 2012 Burton Restricted Easy Livin' Flying V 158
Bindings - 2012 Burton Cartels