Surfers ride WAVES, which are large bodies of water that move in a circular motion. WAVES are created by wind blowing over the surface of the water, and they can range in size from small ripples to large swells. Surfers use these WAVES to propel themselves forward on their boards, allowing them to perform tricks and maneuvers. Surfing is an incredibly popular sport, with people of all ages and skill levels enjoying it around the world.