Energy efficiency refers to using less energy to provide the same service or achieve the same outcome. This can be accomplished through various means, such as improving insulation in buildings, using energy-efficient appliances like LED lights, and optimizing industrial processes. By reducing energy consumption, we can lower utility bills and decrease greenhouse gas emissions, contributing to a more sustainable future. Implementing energy-efficient practices not only benefits the environment but also enhances economic stability. Governments and organizations often promote energy efficiency through incentives and regulations, encouraging individuals and businesses to adopt technologies that minimize energy waste. This collective effort can lead to significant energy savings and a reduced carbon footprint.