What does the ECO button do in a Vauxhall Astra?

I've noticed there's an ECO button on my dashboard in my Vauxhall Astra. What does it do and is it beneficial to use it?

The ECO button in your Vauxhall Astra is a fuel-saving feature that helps reduce fuel consumption and emissions. When activated, it adjusts the engine and transmission to operate at the most efficient levels.

Using the ECO button can lead to slight changes in how your car responds to acceleration. If you prefer a more responsive driving experience, you may not want to use it all the time.

In general, using the ECO button is a good idea, especially for longer drives. It can help you save money on fuel and contribute to a greener environment.