A "Function Key" is a special key on a computer keyboard that performs specific tasks, often labeled as F1, F2, F3, and so on, up to F12. These keys are typically located at the top of the keyboard and can be used to execute commands quickly, such as opening help menus or refreshing a page. Function keys can also be combined with other keys, like the Shift or Ctrl keys, to access additional features. Different software applications may assign unique functions to these keys, making them versatile tools for enhancing productivity and streamlining tasks.