The resolution. It’s "High Definition," but on the lower end compared to 1080p or 4K. It looks great on a phone or tablet, but might look a bit soft on a giant 4K TV.
This is the most important tag. It stands for "Pre-DVD Rip." Usually, this means the source was a promotional DVD or a high-quality "screener" intended for awards or reviews, rather than a final retail disc. It’s better than a "CAM" (someone filming in a theater), but not as sharp as a BluRay. The resolution
The audio format (Advanced Audio Coding). It’s a standard, high-quality stereo sound format that works on almost any device. This is the most important tag
This stands for "Hardcoded English Subtitles." Unlike "soft" subs that you can turn off, these are burned directly into the video frames. The audio format (Advanced Audio Coding)
In short, this file represents a very specific era of a movie's lifecycle—the moment it leaks in decent quality just before the official digital or physical home media release.
This is the "tag" of the release group or website that encoded and uploaded the file.