This is the "tag" of the release group or website that encoded and uploaded the file.
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
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 "tag" of the release group