Load Metadata
A metadata is a piece of information that can be carried by any node of a CAD model’s hierarchy.
If the "Load Metadata" setting is checked in the "Import CAD window", Metadata incorporated in the imported model is imported as properties within Unity, and visible in the Inspector window for each object in the hierarchy.
WARNING Metadata can be imported only when the full product hierarchy is imported (meaning "Hierarchy mode" drop-down list is set to "None").