This indicates the file contains multiple audio tracks (often several different languages).
This is the first segment of a compressed archive. t0a2022 MULTi.1080p.R-MG.part1.rar
This is the resolution, meaning it's Full HD quality. This indicates the file contains multiple audio tracks
Because this is only "Part 1," you won't be able to open or play it on its own. You will need to download all the subsequent parts (Part 2, Part 3, etc.) into the same folder. Once you have the complete set, you can use a program like WinRAR or 7-Zip to extract the actual video file. t0a2022 MULTi.1080p.R-MG.part1.rar
This is the "tag" for the release group that encoded and uploaded the file.