The keyboard document describes important keyboard keys. It explains that the keyboard is used to enter information and lists keys like Enter, Shift, Caps Lock, numeric lock, tab, backspace, arrow keys, delete, home, end, page up and page down. The Enter key submits information, Shift gives keys different meanings, Caps Lock types in capital letters, tab moves the cursor to the next field, backspace deletes text, arrow keys move the cursor and delete removes selected files or text.