If you are a motor vehicle trader, you must put a fuel economy label on all cars you are selling if a label is available. If you are offering a car for sale on the internet, then you have to provide the fuel economy information for that car as text (written words).
From making toast to powering a factory, energy is part of all our lives. Think of it like a jigsaw - it's about connecting all the pieces around how we use energy at home, on the road and at work every day.