Brake pads are a crucial component of a vehicle's braking system and they are designed to create friction with the brake discs to help slow down and stop the vehicle. When the brake pedal Is pressed, hydraulic pressure is applied to the brake pads, causing them to press against the spinning brake discs. which slows down and eventually stops the wheels. It's crucial to ensure that brake pads are changed when needed to ensure the overall effectiveness and safety of the braking system.