Digital twins are transforming the way we design, manage, and understand the world around us. These virtual replicas of real-world objects, systems, and even entire cities allow engineers, scientists, and businesses to simulate outcomes, predict problems, and optimize performance before changes are made in reality. In this video, we explore what digital twins are, how they work, and why they are becoming essential across industries like manufacturing, healthcare, transportation, energy, and smart cities. You will learn how AI, real-time data, and advanced simulations are powering this technology, and how digital twins could reshape everything from climate modeling to personal health. This video offers a clear look at one of the most powerful and quietly revolutionary technologies shaping the future.