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Differences between Lemmy and Mastodon
(lemmy.sdf.org)
A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).
If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!
Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy
How well do the hashtags work in practice on mastodon? Are they used as intended and actually useful?
I feel like less common or more specific hashtags tend to work better. If you try to follow common words like art or music or dogs, it can overwhelm your feed and a lot of it is mediocre. If you browse those tags, you might see more specific tags used along side them focusing on what you actually want.
I can only speak to the topics I followed on another account, but it provided plenty of reading for those topics. Whether it covered all possible posts and whether it works well for all topics, I couldn't say.
It does kind of rely on people tagging things properly, which people might not do if they're on a Mastodon instance specific to that topic. But then, they ought to know that those posts wouldn't Federate well, and indeed, might not want them to.
Hashtags still only show you posts that are specifically addressed to users on your host site. They just act as a quick-search feature. You need some kind of "actor" to re-address things to people who aren't following the OP in order to get true propagation across the network. This is what guppe groups do, and what Lemmy communities do.