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Question: why mastodon hastag timeline shows posts from lemmy community of same name? (feddit.it)
submitted 11 months ago by to c/fediverse@lemmy.world
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While looking for posts with the #degoogle hastag with my mastodon account, I realized that mixed in the hastag timeline there were posts to the !degoogle@lemmy.ml community, but not containing the hastag itself in the text.

I tried to look around, but In wasn't able to find an explanation of how this is supposed to work: is it because of the name of the community that is the same of the hastag? Or is or because the hastag is "embedded" in the community itself?

Edit: for those interested, the explanation is in this comment -> https://lemmy.world/post/39083486/20606028

My timeline on the hastag #degoogle showing a post from @degoogle@lemmy.ml community and a random microblogging post that actually contains the hastag itself
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[–] 15 points 11 months ago (1 child)

According to the protocol they share (ActivityPub) communities and hashtags are essentially the same thing, they're a grouping containing many posts. Typing out a hashtag is how you tell Mastodon to add your post to that "hashtag group" (and you can add your post to multiple hashtags). In Lemmy, the community you post in IS the group (and you can cross-post it to multiple communities). The result is the same. They're the same thing, just different ways of connecting your posts into them, and displayed in very different ways depending on which part of the Fediverse you're using.

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  • [–] 1 point 11 months ago

    No, this is false as far as I can tell. I am willing to be corrected by someone more knowledgeable but my understanding is:

    Communities are implemented not as hashtags, but as special users who "boost" everything addressed to them. That is why Lemmy sometimes gets posts made on Mastodon that mention a Lemmy community. It doesn't always look great: https://discuss.tchncs.de/post/45785836

    So communities and hashtags aren't the same thing. In particular, communities have moderators who can remove things or ban people. Hashtags don't.

    It is a feature of Lemmy that all new posts (not, AFAIK, comments) also get the community name added as a hashtag. This is what OP was seeing and serves to somewhat increase the reach of Lemmy posts. But you can't follow microblog hashtags on Lemmy.

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