I don’t understand what is going on with the graph they present at all. What is the cyan line? What are the bubbles with percentage changes in them? Why is ther

I don’t understand what is going on with the graph they present at all. What is the cyan line? What are the bubbles with percentage changes in them? Why is there a “+18%” bubble right after the huge dip in the cyan line past the “Covid market shock” label? I think the bubbles are maybe “revenue increase per month” but what the hell is the cyan line? LABEL YOUR GRAPHS PEOPLE