The Command Key is a modifier key found on Apple keyboards, often labeled with the ⌘ symbol. It is primarily used to execute keyboard shortcuts, allowing users to perform tasks more efficiently. For example, pressing the Command Key along with the letter "C" copies selected text, while Command + "V" pastes it. This key is similar to the Control Key on Windows keyboards, which serves a comparable function for shortcuts. The Command Key is essential for navigating and managing applications on macOS, enhancing productivity for users of devices like the MacBook and iMac.