A pressure washer is a powerful cleaning tool that uses high-pressure water spray to remove dirt, grime, mold, and other debris from surfaces. It typically consists of a motor, a pump, and a nozzle, which work together to create a concentrated stream of water. Pressure washers are commonly used for cleaning driveways, decks, patios, and vehicles, making them a popular choice for homeowners and professionals alike. These machines come in various types, including electric and gas-powered models, each suited for different cleaning tasks. The pressure is measured in pounds per square inch (PSI), and higher PSI ratings indicate more cleaning power. Accessories like different nozzles and surface cleaners can enhance their versatility, allowing users to tackle a wide range of cleaning jobs efficiently.