The Option Key is a modifier key found on Apple keyboards, typically labeled as "Option" or with the symbol "⌥". It is used to access alternative functions for other keys, enabling users to perform special commands or shortcuts. For example, holding down the Option Key while clicking on a menu item may reveal additional options. In addition to its role in shortcuts, the Option Key can also be used for typing special characters. By pressing the Option Key in combination with other keys, users can create symbols like © or ™, enhancing their text input capabilities on devices running macOS or iOS.