Instagram treats “reach” and “impressions” almost exactly the same way that Facebook does. Reach refers to the total number of unique accounts that have seen your post or story. Impressions measure the total number of times users saw your post or story.
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.