Nikon's Silent Wave Motor (SWM) is a technology used in many of their camera lenses to provide fast and quiet autofocus. This motor utilizes ultrasonic waves to drive the lens elements, allowing for smooth and precise focusing without the noise typically associated with traditional autofocus systems. The SWM is particularly beneficial for photographers who work in quiet environments, such as during weddings or wildlife photography. By minimizing sound, it helps capture moments without disturbing the subject, making it a valuable feature for both amateur and professional photographers.