What is the DSG automatic transmission technology used in Audi vehicles?

I've heard about DSG automatic transmission, but I'm not quite sure what it is and how it works. Can someone explain it to me in simple terms?

The DSG automatic transmission technology, also known as Direct-Shift Gearbox, is a type of dual-clutch transmission that allows for seamless and lightning-fast gear shifts. It works by using two clutches, one for odd-numbered gears and one for even-numbered gears, to pre-select the next gear and switch between them in a fraction of a second. This results in smoother and faster acceleration and better fuel efficiency.