A feedback control system is a mechanism that automatically adjusts its output based on the difference between the desired setpoint and the actual output. This process involves measuring the output, comparing it to the setpoint, and making necessary adjustments to minimize any error. Common examples include thermostats that regulate temperature and cruise control in vehicles that maintain a set speed. These systems are widely used in various applications, from industrial automation to everyday appliances. By continuously monitoring and correcting performance, feedback control systems enhance efficiency and stability, ensuring that processes operate smoothly and meet desired objectives.