The Fn (Function) key is a commonly found key on laptops, often located between the Alt and Ctrl keys. Its primary function is to toggle or activate special functions of other keys or buttons when pressed in combination with one of its adjacent keys. The specific functions associated with the Fn key vary depending on the manufacturer and model of the keyboard. Some common uses of the Fn key include controlling display brightness, adjusting screen resolution, enabling or disabling wireless connectivity, and triggering multimedia playback controls. By pressing the Fn key along with another key, users can access additional features that enhance their computing experience.