A jockey is a professional horse rider who competes in horse racing. They are responsible for guiding and controlling the horse during a race, using their skills to maximize the horse's performance. Jockeys must be lightweight and agile, as their weight can significantly affect the horse's speed and stamina. To become a jockey, individuals often undergo training and may start their careers as apprentices. They typically ride in various races, including those held at racetracks like Churchill Downs or Royal Ascot. Successful jockeys can gain recognition and earn substantial prize money through their performances.