Control theory is a branch of engineering and mathematics that deals with the behavior of dynamic systems. It focuses on how to manipulate the inputs to a system to achieve desired outputs. For example, in a thermostat, control theory helps maintain a specific temperature by adjusting heating or cooling based on the current temperature reading. In everyday life, control theory can be seen in various applications, such as automated vehicles and robotics. These systems use feedback loops to continuously monitor their performance and make adjustments, ensuring they operate efficiently and effectively. By understanding control theory, engineers can design better systems that respond accurately to changes in their environment.