What is the purpose of an intercooler when used with a turbocharger and how does it help in cooling the system?

The purpose of an intercooler when used with a turbocharger is to cool down the hot, compressed air from the turbocharger before it enters the engine. This helps increase the density of the air, allowing for more oxygen to be present in the combustion process, resulting in improved engine performance. The intercooler works by passing the hot air through a series of fins that dissipate the heat, cooling the air before it reaches the engine.