Four metrics can be tracked in this chart area. By default, this is the sixth chart area down your Report page. The four metrics displayed here are:
Engagement Rate: The number of engagements (likes and comments) divided by the total number of followers on a given day.
Average Engagement: Average number of times users liked and commented on a post.
Average Likes: Average number of times users liked a post.
Average Comments: Average number of times users commented on a post.