A belayer is a person who manages the rope for a climber, ensuring their safety while they ascend or descend. The belayer uses a device to control the rope's tension, allowing the climber to move freely while also being ready to catch them in case of a fall. This role is crucial in both indoor and outdoor climbing settings. In rock climbing, the belayer must communicate effectively with the climber, using commands to signal when to climb or take a break. Proper technique and attention are essential, as the belayer's actions directly impact the climber's safety and overall experience in the sport.