Stall speed is the minimum speed at which an aircraft can maintain level flight. Below this speed, the wings cannot generate enough lift to support the weight of the aircraft, leading to a loss of control. Stall speed varies based on factors such as the aircraft's weight, configuration, and environmental conditions. Pilots must be aware of stall speed to ensure safe flight operations. During maneuvers like takeoff and landing, maintaining a speed above stall speed is crucial to prevent stalling. Understanding stall speed helps pilots make informed decisions and enhances overall flight safety.