A Network Amplifier is a device used to boost the strength of signals in a network, ensuring that data can travel longer distances without losing quality. It is commonly used in various types of networks, including Wi-Fi networks and telecommunications, to enhance connectivity and performance. These amplifiers work by receiving weak signals and amplifying them before sending them out again. This process helps to reduce issues like signal degradation and interference, making them essential for maintaining reliable connections in both residential and commercial settings.