PWM Control, or Pulse Width Modulation Control, is a technique used to manage the amount of power delivered to electrical devices. It works by turning the power on and off at a high frequency, varying the duration of the "on" time compared to the "off" time. This ratio, known as the duty cycle, determines the average power supplied to the device, allowing for precise control over speed, brightness, or heat. This method is commonly used in applications like motor speed control, LED dimming, and heating elements. By adjusting the duty cycle, users can achieve desired performance levels while maintaining energy efficiency and reducing heat generation in the components.