This is typically a "release group" or encoder tag. These groups are the architects behind the file, responsible for taking raw or high-definition footage and compressing it into a shareable size while maintaining the best possible quality.
Here is a deep dive into what this file format means and why it matters for your viewing experience. Breaking Down the Code dshft-480p-dual-mkv
This signifies Dual Audio . These files usually contain two separate audio tracks—for example, the original language (like Japanese or English) and a dubbed version (like Hindi or Spanish). You can toggle between these in your player's settings. This is typically a "release group" or encoder tag