Ty!
This explains the report section.
What I wanted to know how does one know the engagement rate? For example, posts on Linkedln have this method:
Dividing post interactions by your total number of followers or by the number of post impressions.
Twitter has something similar.
(Likes + Retweets + Quotes + Replies) divided by the number of tweets, then by the total number of followers, then multiplied by 100
I’m not sure what to use to calculate for discourse 