What does the eco button in the Kia Stonic do?

I'm new to the Kia Stonic and I see there's an eco button, but I'm not sure what it does. Can someone explain it to me?

The eco button in the Kia Stonic helps to improve fuel efficiency by adjusting the engine's power and torque delivery. This can save you money on gas and help reduce your carbon footprint.

The eco button in the Kia Stonic is great for city driving. It reduces the car's acceleration and engine power, making it more fuel efficient in stop-and-go traffic.

I've found that the eco button in the Kia Stonic also helps with smoother and more responsive driving. It's especially helpful when driving on slippery or uneven roads.