It basically means that when you're publishing your model to public, people will see a thumbnail of your model in the library. That thumbnail is the same as the screen you're seeing before you hit 'save' in the workshop. So, when you're finishing your model, align it perfectly to your screen, make sure to have your model in the middle of the screen then hit 'save'. The way you pose your model before you hit 'save' is important as it will attrack more people to view it in 3D.

I'm guessing that you already managed to do so by this time, because that thumbnail is perfectly fine to me. But if in the future, the thumbnail doesn't look good, you can still go back to the workshop, repose your model and hit that 'save' button another time. It will generate a new thumbnail, which will appear after a short delay.

Hope this kind of helps. Anyway, welcome as well! 😃

Thanks, I was kind of confused on that so i appreciate it being cleared up.