Yes, a rocker (also called reverse camber) snowboard is an excellent choice for beginners and powder riders. The board has a downward curve that puts the center on the snow with the tip and tail raised up—like a banana shape. This design makes it much harder to catch an edge, which is why beginners find rocker boards so forgiving and easier to learn on.
In deep powder, rocker really shines. That raised nose naturally floats above the snow instead of diving down, so you spend less energy staying on top of fresh snow. It's also super playful in the park—presses and butters feel effortless because the board already wants to lift at the tips.
The trade-off is edge hold and pop. On icy or hardpacked groomers, rocker doesn't grip as confidently as camber, and you won't get that snappy, powerful feel when loading up for ollies or carving turns. If you mostly ride soft snow or are just starting out, those downsides are easy to live with.