[Glorious1]

I'm still having trouble wrapping my mind around all this. One problem I realized is that I'm unsure what is meant by the terms "library" or "media library" in this context. Does that refer to the collection of media/movie files, perhaps with original artwork, stored locally on disk somewhere? Or is it some Kodi database (if so, what?). Or is it used loosely, sometimes referring to the media files and sometimes to a database?

So many questions . . . I was also trying to understand userdata = ~/.xbmc/userdata.
What is this .xbmc folder in my home directory, which seems to have not much in it? How is it related or linked to the real userdata folder in (my case at)
~/Library/Application Support/Kodi/userdata ??