The Instagrammer on holiday learns how to increase follower engagement by monitoring the reactions that their images receive; the delivery company keeps track of its logistics (and surveils its drivers) on the basis of the customer feedback it receives; the financial analyst scours their Bloomberg terminal for the all-important price movement. The most important thing about feedback isn’t whether it’s positive or negative, but that you get it in the first place, and sustaining a constant feedback loop requires constant vigilance and work.