The rapid growth of software systems has increased energy usage, creating environmental and financial problems. Poorly designed software, heavy algorithms, and unnecessary processes waste energy, raising costs and adding to pollution. To address this, our research focuses on making the software more energy-efficient without losing performance. We use tools like Intel Power Gadget to measure how much energy a software uses and suggest ways to improve, such as optimizing algorithms, managing memory efficiently, and cleaning up code. These techniques provide simple, practical steps for developers to create energy-saving software that supports sustainability and reduces costs.