How does the Audi A4's Quattro system improve handling in challenging road conditions?

The Audi A4 boasts a Quattro all-wheel drive system, but does this actually make a difference in real world driving? Does it improve handling and traction on wet or snowy roads? I'm considering purchasing the A4 for its performance and want to understand how this system works.

The Quattro system in the Audi A4 utilizes torque vectoring, continuously adjusting power distribution between all four wheels to provide optimal grip and handling in different driving conditions. I've been personally driving an A4 for years and have seen a significant improvement in performance and safety with this system.