Take this post, for instance:
https://fedia.io/m/lemmyworld@lemmy.world/t/6403/Does-lemmy-world-allow-criticism-of-the-CCP
The user and magazine are both from Lemmy.world, but next to the title it says (fedia.io). What does that site in the parentheses mean?
Ok that makes sense. Basically like “self” on reddit, which was also a bit confusing. It should probably say “article” or the instance it came from as you suggest.