The Net Promoter Score (NPS) is a customer satisfaction metric that divides customers into Promoters, Passives, and Detractors based on their likelihood to recommend a company. It is hypothesized that the difference between the percentage of Promoters and Detractors correlates to a company's long-term growth potential. Top NPS scores in surveys include USAA at 83%, Amazon at 76%, and Apple at 72%. Companies can measure their NPS by asking customers on an 11-point scale how likely they are to recommend the company to friends and family, along with a follow-up question to understand their reasons.