The stall speed is the minimum speed at which an aircraft can maintain controlled flight. Below this speed, the aircraft loses lift and begins to descend. The stall speed is determined by the amount of lift that the aircraft's wings can generate at a given speed. As the speed decreases, the lift also decreases, until the point is reached where the aircraft can no longer support its own weight.
The F-15 Eagle is a highly maneuverable aircraft, and its stall speed is relatively low compared to other fighter jets. This allows the F-15 to perform a variety of maneuvers, including tight turns and high-speed rolls. The F-15's maneuverability is one of its key advantages in combat.