ER for Instagram is the amount of “total engagement” received by an Instagram account over a specific period of time, expressed as a percentage of followers. The equation is written as Engagement = Engagement / Followers. Engagement is defined as anytime a user likes or comments on one of your posts.
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.