Commuter: Boards designated as Commuter are typically easier to push because they sit lower to the ground and are well suited to travel long distances... or just get you to work without having to fight traffic. They typically have longer wheel bases, and larger diameter wheels to maintain speed as well.
Carving: If you like boards that hold their line well in turns, and don't slide out very much, then keep an eye out for this designation. That doesn't mean that they won't slide at all, rather that they are typically set up with lipped wheels that grip better while maintaining speed.
