A feedback amplifier is an electronic circuit that uses feedback to enhance its performance. It takes a portion of the output signal and feeds it back to the input, which helps to stabilize the gain and improve linearity. This process can reduce distortion and increase the overall efficiency of the amplifier. Feedback amplifiers are commonly used in various applications, including audio systems and communication devices. By adjusting the feedback level, engineers can fine-tune the amplifier's response to meet specific requirements, making them versatile components in modern electronics.