The significance of 3D modeling in design lies in its ability to provide realistic visualizations of products or environments before they are built or manufactured. This technology enables designers to create three-dimensional representations that can be manipulated and analyzed for functionality and aesthetics. 3D modeling aids in enhancing creativity by allowing for rapid iterations and modifications, thus leading to more efficient design processes. It is widely used in fields such as architecture, gaming, and industrial design for prototyping and visualization.