Keyboard commands are specific combinations of keys that perform various functions on a computer or device. They help users navigate software more efficiently, execute commands quickly, and enhance productivity. Common examples include Ctrl + C for copying text and Ctrl + V for pasting it. These commands can vary between different operating systems and applications. For instance, Windows and Mac computers have distinct keyboard shortcuts, such as Command + Z for undoing an action on a Mac, while Ctrl + Z serves the same purpose on Windows. Learning these commands can significantly streamline your workflow.