Why does the Audi A1 need a direct-shift gearbox (DSG)?

I've been researching about the Audi A1 and noticed that it comes with a direct-shift gearbox (DSG). What is the purpose of this feature and why is it important?

The direct-shift gearbox (DSG) in the Audi A1 is crucial for achieving faster and smoother gear changes. It also helps to improve fuel efficiency and reduce emissions.

The DSG in the Audi A1 uses two clutches to pre-select the next gear, resulting in a seamless transition between gears and eliminating any loss of power during shifts.