Car mats are used so that the car floor does not get dirty with use, as the driver might have to get into the car in all kinds of weather. Slush, mud and dirt can spoil the interior. Car mats are an e... Car mats are used so that the car floor does not get dirty with use, as the driver might have to get into the car in all kinds of weather. Slush, mud and dirt can spoil the interior. Car mats are an easy way out of such damage as they are removable and can be cleaned easily. Source: Free Articles from ArticlesFactory.com