Feedback control is a process used to maintain a desired output in a system by adjusting inputs based on the difference between the actual output and the desired output. This method is commonly applied in various fields, including engineering, robotics, and even biology, to ensure systems operate efficiently and accurately. In feedback control, sensors measure the current state of the system, and this information is compared to a set target. If there is a discrepancy, adjustments are made to the inputs, allowing the system to correct itself. This principle is fundamental in technologies like thermostats and automated manufacturing systems.