SolidWorks is 3D design software that allows users to sketch ideas and experiment with designs to create 3D models. It is used by students, engineers, and professionals. The SolidWorks model consists of parts, assemblies, and drawings. Parts are made up of features such as base features created from 2D sketches, boss features that add material, and cut features that remove material. Dimensions and geometric relationships define the size and relationships between features.