A timing belt is a toothed belt made of rubber or other flexible materials with embedded reinforcements like fiberglass or steel cords. It is used to synchronize the rotation of two or more shafts in an engine or machinery, ensuring precise timing and coordination between various components. Timing belts are commonly found in internal combustion engines, such as those in automobiles and motorcycles, where they connect the crankshaft to the camshaft, controlling the opening and closing of engine valves. They are also used in various industrial applications, including conveyor systems and printing machines, to ensure accurate and reliable motion control.