A heatsink is a device designed to absorb and dissipate heat from electronic components, such as CPUs or GPUs, to prevent overheating and ensure reliable operation. Typically made from metals like aluminum or copper, heatsinks increase the surface area exposed to air, allowing heat to disperse more efficiently. They are essential in computers and other electronics to maintain optimal performance and prolong component lifespan. In some DIY projects, everyday objects like coins have been used as makeshift heatsinks.