The latest Mastodon update lets you follow hashtags. When you follow, posts with a tag appear in your timeline automatically.

Try following #Gardening to make posts about gardening appear in your timeline.

This can be REALLY useful for discovering interesting accounts.

To follow a hashtag:
1. Log in through your server's website
2. Search for hashtag
3. Click it to see its results
4. Click on 👤+ icon in top right (click again to unfollow)

Posts from followed tags are visible in the apps too.

@feditips How do you review and and remove hashtags you have subscribed to before?

@sonofjon I was just looking for that too. Also wondering how it highlights that it's a hashtag follow in my home timeline.

Maybe I just need to play with this a bit more to spot it.

@feditips

@mackaj @sonofjon @feditips You can see if it's a followed hashtag by searching for it again. The icon is different for followed/unfollowed. But I would love to know how to view all your followed hashtags. Haven't found that yet.
@sonofjon @feditips #metoo I would like the followed hashtags to appear in the "followed" list.