Instagram now lets users follow hashtags in the same way they can currently follow other accounts.
Users can now search for topics that interest them or tap hashtags that are already included in posts to bring up relevant hashtags and related accounts in their search results. To follow a hashtag, they can open the hashtag page and tap the follow button, after which top posts containing that hashtag will begin appearing in their feed and their Stories bar.
On the topic of privacy, Instagram said, “to give you more ways to find hashtags you might like, you can check out the hashtags other people follow in their profiles. Similar to people you follow, hashtags you follow respect your privacy settings. If you set your account to private, the hashtags you follow will only be visible to your followers.”
Source: The Verge