What are speed brakes used for in aviation?

Speed brakes are designed specifically to reduce an aircraft's speed during various phases of flight. When deployed, they increase drag, allowing pilots to slow down more efficiently without needing to rely solely on engine power or descent. This function is particularly beneficial when preparing for landing, conducting slow flight operations, or executing specific maneuvers that require a decrease in airspeed.

While increasing altitude, enhancing lift, or stabilizing yaw can play important roles in flight operations, none of those functions align directly with the primary purpose of speed brakes. Instead, speed brakes are a critical tool for managing airspeed safely and effectively, ensuring that the aircraft can respond appropriately to the demands of flight operations.