Navigation keys are special buttons on a computer keyboard or device that help users move around a screen or document. Common navigation keys include the arrow keys, which allow you to move the cursor up, down, left, or right, and the Tab key, which helps you jump between different fields or options. These keys enhance user experience by making it easier to access different parts of a program or webpage without using a mouse. Other important navigation keys include Page Up, Page Down, and Home, which help you quickly scroll through long documents or return to the beginning of a page.