A heat sink is a device designed to absorb and dissipate heat generated by electronic components, such as computer processors or LED lights. It typically consists of a metal, like aluminum or copper, with a large surface area to enhance heat transfer. By spreading out the heat, a heat sink helps maintain optimal operating temperatures, preventing damage and ensuring efficient performance. Heat sinks work by conducting heat away from the source and releasing it into the surrounding air. They can be passive, relying on natural convection, or active, using fans to increase airflow. Proper heat management is crucial for the longevity and reliability of electronic devices.