For a practical test, search for kbin.social (and then ctrl+f for it also to get the direct results). Or, just look at a community: [email protected]

The only thing that appears missing is the avatars images. Though I assume the text content is doomed in the long-run when it comes to new instances, as I doubt re-federation (3rd-party federation) is a thing. Unless of course, someone manually crossposts said content.

i think the significance of the ‘lemmy.world’ is the origin of the post… in this case [email protected] posted it to sh.itjust.works

Close, it’s where the image is hosted. The lemmy.world bit is a link to the image. Just like how any website link will say the domain of the destination.

I mean it probably is where a user is posting from, but sometimes it is not (not sure why but sometimes non-ml users will post images from ml)