How does the Quattro system in the Audi A5 ensure maximum traction and stability?

I am looking to buy an Audi A5 and I have heard a lot about the Quattro system. Can you explain how it works and why it is beneficial?

The Quattro system in Audi A5 constantly monitors the traction of all four wheels and automatically transfers power to the wheels with the most grip, ensuring maximum stability and control.

One of the key benefits of the Quattro system in Audi A5 is improved performance and handling, especially in adverse weather conditions.