How does the quattro all-wheel drive system on the Audi A5 work?

I've heard that the quattro all-wheel drive system on the Audi A5 is one of the best in the market. Can someone explain to me how it works and what makes it so special?

The quattro all-wheel drive system is a permanent AWD system that uses a combination of mechanical, electronic, and hydraulic systems to distribute power between all four wheels as needed. This provides better traction and stability in various driving conditions.

Audi's quattro system employs a center differential and torque vectoring to distribute power between the front and rear axles, as well as between the left and right wheels. This allows for precise and responsive handling in all situations.

The quattro AWD system on the Audi A5 is constantly monitoring the road conditions and can send up to 70% of torque to the front wheels, or up to 85% to the rear wheels, to maintain optimal grip on any surface.