What is the main function of the crankshaft in an Audi 80?

I have heard a lot about the importance of the crankshaft in an Audi 80 engine, but can someone explain exactly what it does and why it is necessary? Is it just used to convert the up-and-down motion of the pistons into rotational motion, or does it serve other functions as well?

The crankshaft in an Audi 80 is responsible for converting the up-and-down motion of the pistons into rotational motion, which then powers the wheels. However, it also plays a crucial role in balancing the rotational forces coming from the pistons, ensuring a smooth and efficient flow of power to the drivetrain.