A digital twin is a virtual representation of a physical system, used for simulation and analysis. Engineers can test modifications digitally before implementation, predicting outcomes accurately. Applications include city traffic management, industrial workflow optimization, and smart home automation. By creating digital twins, businesses reduce errors, save resources, and gain insights that would be costly or risky to acquire in the real world. This technology bridges virtual planning and physical operations, making systems smarter and more efficient.
**Key takeaway:** Virtual replicas let us experiment safely before real-world changes.