What is the Net Promoter Score (NPS) System?

Last week, I traveled to Florida (I do this every quarter or so) and for the first time I listened to a book on Audible on the way down. I selected The Ultimate Question 2.0: How Net Promoter Companies Thrive in a Customer-Driven World after a dialogue with some marketing professionals online. The Net Promoter Score system is based off of a simple question… the ultimate question: On a scale of 0 to 10, how