State feedback is a control strategy used in systems to improve performance by adjusting inputs based on the current state of the system. In this approach, the controller measures the state variables, which represent the system's condition, and uses this information to calculate the necessary adjustments to maintain desired behavior. This method is commonly applied in engineering and robotics. By applying state feedback, engineers can stabilize systems, enhance response times, and achieve specific performance criteria. It is often implemented in conjunction with techniques like state-space representation and control theory, allowing for more precise control over dynamic systems, such as automobiles or aerospace vehicles.