What LODgroup option should I choose when importing an object

Hi guys I don’t know what LODgroup should I choose when I importing an object, here is the screenshot.
Also, is LODgroup important? I have created some models in Blender, but I havent create any LOD groups for them yet, that’s why I don’t know should I choose any of those options or not.

Hello ALTWang,

The import Mesh LOD’s is what should be selected upon importing your LOD’s. If you don’t have any LOD’s you can leave everything default.