Since they are federated out to other platforms, each platform decides how to use them. Some platforms will use your hashtags to categorize similar posts, sometimes making post searchable by hashtag. But the exact functionality depends on the platform that received the post.
this post was submitted on 28 Mar 2025
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@CWSmith hashtags in NodeBB are only relevant at the topic level — that's just how it was designed years ago.
You'll note that on microblogs, tags can be added on any post. While we show them, we don't consume or index them unless they are the original post.
When you use tags in NodeBB, they are federated outward with the original post.
Hope that helps!
Thanks, tells me what I needed to know. Even on Mastodon I only really use Hashtags on posts and not on replies so that tracks for personal usage.