Why is the Ford Puma's fuel efficiency rating so high?

I am looking to purchase a Ford Puma but before I do, I wanted to know what makes it stand out in terms of fuel efficiency. Can someone explain to me the technology behind its high rating?

Julia, the Ford Puma uses a mild hybrid system which helps increase its fuel efficiency. It also has a start-stop system that shuts off the engine when the car is idling. This combination of technology helps reduce fuel consumption.

Julia, in addition to the mild hybrid system and start-stop technology, the Ford Puma also has a smart regenerative braking system that captures energy while braking and stores it for later use. This further improves its fuel efficiency.