It indicates that a previous version of this specific episode (released by the same group or others) had a technical flaw, and this version is the . 🔍 Why a release is labeled "PROPER"
Likely an abbreviation for the anime title (e.g., Shinmai Maou no Testament or similar, depending on their naming convention). EP 12 END: The final episode of the season/series. [Witanime.com] SMNB EP 12 END BD-HD.mp4
The sound doesn't match the characters' lip movements. It indicates that a previous version of this
A "proper" release is issued when the initial upload contains one of the following issues: The sound doesn't match the characters' lip movements
If you see in a file name, it is almost always the best version to download , as it solves a known problem found in the "Internal" or original release.
Missing lines, poor timing, or major translation mistakes.