Closed-loop control is a system that automatically adjusts its output based on feedback from its performance. This means that the system continuously monitors its results and makes corrections to achieve the desired outcome. For example, a thermostat in a home uses closed-loop control to maintain a set temperature by turning the heating or cooling system on or off as needed. In closed-loop control, the feedback is essential for accuracy and stability. The system compares the actual output to the desired target, known as the setpoint. If there is a difference, the system makes adjustments to minimize this error, ensuring that the output remains as close to the setpoint as possible.