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Hey @helpers or any helpful #Friendica users. I'm trying to understand the difference between Categories and Hashtags.

From what I'm seeing, categories never leave the server, but hashtags do get federated out. They kind of look the same in the timeline, with hashtags having a lightning bolt, and categories being green with "X's" that allow you to remove them.

So why choose one over the other? Or why combine them?

Thanks!
Screenshot of Friendica post, with several hashtags entered inline in the post, and then some categories which are added separately. The categories appear with a green background, while the hashtags have a lightning bolt. Also, it appears I can remove the categories from there, but not the hastags.
Categories are only for you to sort your timeline more clearly. Hashtags help others find your posts. I only use hashtags because I can sort the timeline with them.
Categories makes my public profile feel a little bit more sorted and i consider it bad that categories are not federated in any way.

Yet, anybody who visits my profile on my site can filter my posts accordingly, that's enough for me to use it