Repeaters are devices used in telecommunications to extend the range of signals. They receive a weak or distorted signal, amplify it, and then retransmit it, ensuring that the information can travel longer distances without losing quality. This is particularly useful in areas where the original signal cannot reach due to obstacles or distance. In wireless networks, repeaters help improve connectivity by boosting the signal strength in areas with poor reception. They are commonly used in homes and offices to enhance the performance of Wi-Fi networks, allowing devices to maintain a stable connection even in larger spaces or through walls.