What are the advantages of using feedback in control systems?

Feedback provides: improved accuracy (error between desired and actual is corrected), reduced sensitivity to parameter variations (changes in plant don't affect output as much), disturbance rejection (compensates for external disturbances), and ability to modify system dynamics (change response speed, damping). Trade-offs include increased complexity, potential instability if poorly designed, and additional cost of sensors and controllers. Feedback is fundamental to most industrial control systems.