Why does the Audi A6 have a electronically controlled limited slip differential?

I've noticed that some models of the Audi A6 come with an electronically controlled limited slip differential (eLSD), while other models do not have this feature. What is the purpose of this feature and how does it improve the driving experience?

The electronically controlled limited slip differential (eLSD) allows for better traction and stability control, especially during sharp turns or slippery road conditions. It works by distributing power from the engine to the wheels with the most grip, providing a smoother and more controlled drive.