Instagram has introduced a new feature that lets you mute an account to hide posts in your feed from certain accounts, without unfollowing them.
When you mute an account, you can still see posts on their profile page and get notified about comments or posts you’re tagged in. The accounts you mute will not be aware that you’ve muted them. You can always unmute an account to get their posts back in your feed.
To mute an account, just tap the … menu in the corner of the post. From there you will see an option to Mute an account in addition to Report and Unfollow. You can also mute posts and stories by pressing and holding on a story in your tray, or from a profile.
source: Instagram