A polishing pad is a tool that can be used to apply polish to a surface and process it in a mechanical way. Although these are most commonly used in combination with a machine polisher, there are also polishing pads to be used by hand.
Wiper marks are surface imperfections in the direction and line that windscreen wipers move. Simply put, these are marks in the glass caused by the movement of the windscreen wipers. They can affect your vision and are difficult te remove.