What does the 'EcoMode' feature do in the Ford Kuga?

I've noticed an 'EcoMode' button on my Ford Kuga, but I'm not sure what it does. Can someone explain its purpose and if it's worth using? Thanks.

The 'EcoMode' feature helps improve fuel efficiency by optimizing the engine and transmission settings. It's definitely worth using, especially for longer drives.

I've found that the 'EcoMode' feature can make the car feel a bit sluggish, so I only use it when I'm driving in heavy traffic.