To be honest, you should have a good idea of the overall purpose of this device by now. But, to wrap it up into one convenient answer, it is designed to cool your laptop when it begins to overheat. Yes, this is obvious but many of you may feel it is pointless due to the built-in cooling fans in laptops. However, during heavier use, computers may require more than just their internal cooling fan. This is where a laptop cooler comes in handy. Of course, it can also be nice if you are sitting with it on your lap.