Activate this option to convert all geometry into locators (dummy objects) during the export process.
This option is often used for animation only files. It creates a smaller file size, and is supported by FBX Importer when you import it into the original scene.
In this case, the plug-in imports only animation onto original geometries, and does not add incoming Nulls to the existing scene. If you import the same file into a new scene, the plug-in imports Nulls with the animation applied.