A feedback system is a process that uses information about the output of a system to adjust its input or operation. This helps maintain stability and improve performance. For example, in a thermostat, the temperature reading is used to turn the heating or cooling system on or off, ensuring a comfortable environment. Feedback systems can be classified into two main types: positive feedback and negative feedback. Positive feedback amplifies changes, leading to a greater response, while negative feedback counteracts changes, promoting stability. Both types are essential in various fields, including biology, engineering, and economics, to regulate processes effectively.