Energy efficiency means using a certain amount of energy as effectively and efficiently as possible to achieve a certain result. It means using energy as effectively as possible to achieve the desired purpose. Energy efficiency in business means that companies save energy by adopting energy conservation measures and using energy efficient technologies. This can help reduce energy demand and the cost of energy while reducing environmental impact. Energy-efficient measures that companies can take include installing energy-efficient equipment, using renewable energy sources such as wind power and solar energy, implementing energy management systems, and applying energy conservation measures.