Brake pads are friction surfaces responsible for decelerating a vehicle by creating resistance against rotating brake rotors. Positioned within the brake caliper assembly at each wheel, they convert kinetic energy into thermal energy through repeated contact. Modern brake pads utilize composite materials—typically a blend of organic compounds, semi-metallic particles, or ceramic fibers—bonded to a steel backing plate for structural integrity. Friction material composition directly influences stopping performance, noise characteristics, and rotor wear. Pad design incorporates features like chamfers, slots, or shims to mitigate noise and manage heat buildup.