The significance of the DWG file in design is that it is the native and standard file format for storing two- and three-dimensional design data and metadata.

DWG is used by several CAD (computer-aided design) applications, such as AutoCAD, DraftSight, ZWCAD, and IntelliCAD, to create and edit drawings for architecture, engineering, construction, and other design fields.

DWG files allow for precise measurements, angles, and shapes, as well as collaboration and compatibility between different CAD software.