What does the 'Econ' button do in the Vauxhall Astra?

I just bought a used Vauxhall Astra and noticed a button labeled 'Econ' on the dashboard. What is it for and when should I use it?

The 'Econ' button stands for economy mode and it is designed to improve fuel efficiency by adjusting the engine's performance and other systems in the car. It is recommended to use it when driving on long stretches of highway or in heavy traffic.

The 'Econ' button can also reduce the power and responsiveness of the car's air conditioning and climate control system. It is best to use it during hot summer days to save on fuel consumption.

However, it is important to note that using the 'Econ' button may slightly decrease the car's performance and acceleration. So if you're looking for a more sporty driving experience, you may want to turn it off.