Energy efficiency refers to using less energy to perform the same task or produce the same result. For example, using a LED light bulb instead of a traditional incandescent bulb can provide the same amount of light while consuming significantly less electricity. This not only helps save money on energy bills but also reduces the overall demand for energy, which can benefit the environment. Improving energy efficiency can be achieved through various methods, such as upgrading appliances to more efficient models, enhancing insulation in homes, or utilizing smart technology to optimize energy use. By making these changes, individuals and businesses can contribute to a more sustainable future while enjoying lower energy costs.