What is GameController tag used for?

So I found out that "EditorOnly" tag remove objects when building a game. So then I wonder what special purpose "GameController" tag has for your game? I haven't been able to find any documentation for it.

As far as I know "GameController" is just a standard tag. "EditorOnly" and "Main Camera" are the only ones that have special properties. The others are just for convenience so that you don't have to create your own tags.

usually you need to find your controller/manager gameobjects to keep a reference to them and call their methods. so they created this tag to be attached to sound manager, level manager and game manager and ... there is not any special property for it but because nearly all games designed well would need something like this, they just made it built in.