A hotkey is a specific key or combination of keys on a computer keyboard that performs a particular function or command. Hotkeys are designed to enhance efficiency by allowing users to execute tasks quickly without navigating through menus. For example, pressing Ctrl + C copies selected text, while Ctrl + V pastes it. Hotkeys are commonly used in various software applications, including word processors, graphic design programs, and web browsers. They can be customized to suit individual preferences, making it easier for users to streamline their workflow and improve productivity.