It is commonly used for cleaning a variety of outdoor surfaces, including sidewalks, driveways, decks, siding, and vehicles. The process involves the use of a specialized pressure washer machine, which typically consists of a motor or engine that powers a pump to generate high-pressure water flow. The water is then expelled through a handheld wand or nozzle at a controlled pressure onto the surface being cleaned. The force of the water effectively dislodges and washes away dirt, stains, and dirt debris, leaving behind a clean and refreshed surface.