Reins are long, narrow straps attached to a horse's bridle, allowing a rider to control the animal's movements. By pulling on the reins, the rider can signal the horse to stop, turn, or speed up. This communication is essential for safe and effective riding, whether in a casual setting or during competitive events. In addition to their practical use, reins come in various materials, such as leather or synthetic fibers, and can be designed for different riding styles, like English or Western. Proper use of reins helps create a strong bond between the rider and the horse, enhancing the overall riding experience.