In the Profile Analysis section, you’ll find the engagement rate by day chart.
It depicts the amount of interaction your content earns relative to the size of your audience.
It’s calculated as the total number of interactions your posts receive divided by your total number of followers (multiplied by 100%)
To exemplify it:
Let’s say your profile has 1,000 followers, and 200 of them interact with your content – your engagement rate comes to 20%
Keep in mind that ER only concerns comments and likes from users who are your current followers.
It doesn’t consider engagement from people who don’t follow you at the moment 