3D Simulation is a technology that creates a three-dimensional representation of objects or environments using computer software. This allows users to visualize and interact with these models in a realistic way, making it useful in various fields such as architecture, gaming, and medical training. By simulating real-world scenarios, 3D simulations help in understanding complex systems and processes. For example, engineers can test designs before building, while doctors can practice surgeries in a risk-free environment. Overall, 3D simulation enhances learning and decision-making by providing immersive experiences.