T0a2022 Multi.1080p.r-mg.part1.rar 100%

This is usually a shorthand code or abbreviation for the title of the content.

This is the resolution, meaning it's Full HD quality. t0a2022 MULTi.1080p.R-MG.part1.rar

It looks like you’ve come across a piece of a larger archive, likely a high-definition video file split into multiple parts for easier sharing. This is usually a shorthand code or abbreviation

This indicates the file contains multiple audio tracks (often several different languages). t0a2022 MULTi.1080p.R-MG.part1.rar

This is the first segment of a compressed archive.

Here is a quick breakdown of what that file name actually means: