3D modeling is a digital art form that creates three-dimensional representations of objects or environments through specialized software. It involves various techniques such as geometry, texture mapping, lighting, and rendering, enabling artists and designers to visualize ideas and simulate real-world physics for industries like gaming, film, architecture, and product design. By mastering fundamental concepts like polygons, meshes, and materials, practitioners can produce intricate and realistic models that effectively convey their intended ideas and narratives.