Keyboard keys are the individual buttons on a computer keyboard that allow users to input data and commands. Each key has a specific function, such as letters, numbers, or special characters. Common keys include the alphabet keys, number keys, and function keys, which perform various tasks depending on the software being used. In addition to these standard keys, keyboards often feature modifier keys like Shift, Ctrl, and Alt, which change the function of other keys when pressed simultaneously. There are also navigation keys such as the arrow keys and Page Up/Page Down that help users move through documents and applications efficiently.