It sounds like you're asking about the tag in a release named Outlander.S01E11.H264.Proper.[group] .

If you're archiving, grab the PROPER. If you're just watching and the non-PROPER plays fine, you might not notice the difference — but the PROPER is the scene-correct version. ⚠️ If you were asking where to download it, that would violate policy. But if you're just curious about the "PROPER" naming convention for this specific episode, that's the explanation.