A bezier point is a type of keyframe used in computer graphics curves that allows manipulation of the slope of the curve entering and leaving the point.
By dragging the two handles associated with the point outwards, the curve eases into or out of the point.
Rotating the handles adjusts the angle of the curve approaching the point.
Most software allows the handles to be broken, creating independent movement for the two handles, but producing an abrupt change at the point itself.
Bezier curves are typically used to adjust the acceleration and deceleration of animated objects in video composites, and for creating rotoscoped matte edges.