The Net Promoter Score (NPS) is a metric used to measure customer loyalty by asking two simple questions: "How likely are you to recommend our brand/product/service to a friend or colleague?" and "What's the most important reason for your score?" The NPS score is calculated by subtracting the percentage of detractors from the percentage of promoters, with higher scores indicating better customer loyalty. A good NPS score is above zero, with +100 being the highest possible score. While NPS has been widely adopted and is considered an effective metric, its accuracy has been questioned by some critics who argue that it fails to predict customer loyalty. To implement a Net Promoter Score survey, companies can send surveys to 1/90th of their users every day for 90 days, with follow-up emails to engage with customers and improve the business. The true value of NPS lies in its ability to start a conversation with customers and lead to improved customer loyalty and retention.