A heatsink is a device used to dissipate heat away from electronic components, such as microprocessors and LEDs. It typically consists of a metal structure with fins that increase its surface area, allowing for better heat transfer to the surrounding air. By keeping components cool, heatsinks help maintain performance and extend the lifespan of electronic devices. Heatsinks are often made from materials like aluminum or copper due to their excellent thermal conductivity. They can be passive, relying solely on natural airflow, or active, using fans to enhance cooling. Properly designed heatsinks are essential for efficient thermal management in various applications.