If you have downloaded a file with that specific name, the most "useful feature" is actually a built-in safety mechanism:
Running the verification takes a few minutes, whereas a failed installation of a massive game like Victoria 3 can waste an hour of your time. Victoria 3 [FitGirl Repack].rar
FitGirl Repacks almost always include a .bat file (usually named Verify BIN files before installation.bat ) inside the folder. Here is why you should use it: If you have downloaded a file with that
If the verification tool shows "MD5 mismatch" or missing files, you know immediately that your download is bad and you shouldn't bother trying to install it. Repacks use heavy compression
Repacks use heavy compression. If even one "bit" is corrupted during your download, the entire installation will fail halfway through or the game will crash at startup.