This is the "tag" of the release group that prepared and uploaded the file. Context: The Movie's Reception
The video resolution (1280 x 720 pixels), which is standard High Definition. Halloween.Ends.2022.720p.WEB-DL.sub.eng.x264-PE...
This indicates the source of the file was a "Web Download," typically ripped from a streaming service like Peacock or Apple TV without any lossy re-encoding of the original stream. sub.eng: English subtitles are included. x264: The compression codec used to encode the video. This is the "tag" of the release group