I've come on mastodon to share a piece about mastodon, which sounds like the kind of cannibalistic self-referentialism that started mad cow disease https://www.theguardian.com/media/2022/nov/16/could-this-be-twitter-without-the-toxic-slurry-my-week-on-mastodon
‘Could this be Twitter without the toxic slurry?’ My week on Mastodon

Elon Musk’s takeover of Twitter has left many users wondering if they should join its rival, which promises a ‘different kind of social media experience’. But how different is it? I decided to find out

The Guardian
@zoesqwilliams Just read this. It's a good read. A lot of servers just updated yesterday so you can now follow specific # tags for things that interest you. Just search for a hashtags you like, lets say #vaping and you should see a small button, not dissimilar to the one for following another user, and now you'll see posts (toots) in your timeline from anyone # tagging vaping. It's a good way to keep track of your interests and meet like-minded people.
@zoesqwilliams Also on the webview, though this may appear different on your specific server I don't know, but you can search for a # tag and then Pin/Unpin it as you can see from my example below. Maybe it will help you navigate this place.
@BadBeardDude
Either the server I joined hasn't been updated or it's the android app (official Mastodon), but I see no such button in the search bar.
@Bk13051 I don't see it in the official app either but on my server on the webview on the website, I can search for any # and follow and pin it just like a user. I can't speak for your server.