Purpose of "Group Versions" option?

[Iskelderon]

What's the purpose of this context menu entry when multiple items are selected? 
Despite the name, it certainly doesn't work on things like alternate versions of movies on different drives (e.g., old DVD rip on one drive and later a BRRip gets added on a different one).

[TheDreadPirate]

For "versions" of movies, you need to have them in the same folder and name them appropriately.

https://jellyfin.org/docs/general/server...of-a-movie

The option you are referencing I've only used on versions of a TV show episode.