What is Audi A7's Virtual Cockpit system and how does it work?

I've heard about the Virtual Cockpit feature on the Audi A7, but I don't know what it is or how it works. Can someone explain it to me?

The Virtual Cockpit system on the Audi A7 is a fully digital instrument cluster that sits behind the steering wheel. It replaces traditional analog gauges and displays all the necessary information in high definition.

To use the Virtual Cockpit, simply use the buttons on the steering wheel to navigate through different screens and display options. You can also use voice commands to control certain features.