The article presents a way to measure how well European countries are doing in moving towards sustainable energy. The researchers looked at social, economic, and environmental factors to create an index. Denmark, The Netherlands, and Austria are leading the way, while Estonia, Malta, Slovakia, Poland, Greece, Cyprus, and Bulgaria need to improve. The study shows that the choice of indicators and methods used can greatly affect the rankings. It's important to carefully select indicators and methods to make sure they are relevant for policymakers.