Windshield wipers are mechanical devices found on vehicles that help keep the windshield clear of rain, snow, and debris. They consist of a long, flexible blade attached to a pivoting arm that moves back and forth across the glass. This motion helps to wipe away water and improve visibility for the driver, especially during inclement weather. Most windshield wipers operate using an electric motor that powers the movement of the blades. The speed and frequency of the wipers can often be adjusted based on the amount of precipitation. Regular maintenance, such as replacing worn-out blades, is essential for optimal performance and safety while driving.