A repeater is a device used in telecommunications to receive a signal and retransmit it to extend the range of communication. It helps to boost weak signals, ensuring that data can travel longer distances without losing quality. Repeaters are commonly used in various applications, including radio, television, and internet networks. In wireless communication, a repeater can be crucial for maintaining connectivity in areas with poor signal strength. By amplifying the signal, it allows devices like smartphones and computers to communicate more effectively. This technology is essential for enhancing coverage in large buildings or remote locations, improving overall user experience.