Customer loyalty is a key driver of sustainable growth, and Bain & Company’s Net Promoter System (NPS) is an effective way to measure it.NPS categorizes customers into promoters (9-10), passives (7-8), and detractors (0-6) based on their likelihood to recommend a product or service.A higher NPS indicates stronger customer loyalty, while negative scores may indicate struggling businesses.By embedding NPS into company culture, businesses can drive long-term growth, reduce churn, and build lasting customer relationships.