A supercharger is a mechanical device designed to boost an internal combustion engine's performance by compressing and delivering more air to the engine's intake, allowing for greater fuel combustion and increased power output. Unlike turbochargers, which use exhaust gases, superchargers are driven directly by the engine's crankshaft, providing immediate power gains. They are widely used in high-performance cars, racing applications, and certain commercial vehicles to enhance acceleration and overall engine efficiency.