The users, who are interesting on your Instagram account in a continuous way, will be on the top of the list of your story viewers on Instagram account. If you are finding the same person on the top of the list of story viewers, means that he is a most interacting user on your Instagram account.
What happens after 10k followers on Instagram?
Once you have 10k followers, Instagram will make it easier for you to get people to your website via Stories with the swipe up to link feature. Swipe up is the only way to get a direct link from your Instagram to your other web properties. And, it’s available in STORIES, if you have 10k followers.