Net Promoter Score (NPS)

"The Net Promoter Score (NPS) is a metric that measures customer loyalty and is based on a single question: ""On a scale of 0 to 10, how likely are you to recommend our product/service to a friend or colleague?"" The results are divided into Promoters (ratings of 9 or 10), Passives (ratings of 7 or 8), and Detractors (ratings of 0 to 6)."