NRR measures whether a customer cohort spends more or less with the company a year after they entered. NRR > 100% means expansion exceeds churn, the cohort is worth more even before considering new customers. NRR > 120% is the bar for top-decile B2B SaaS.
High NRR is the strongest available proof of structural value. It compounds over time and dramatically reduces the company's need for new logos. Low NRR is the leading indicator of a leaky bucket no acquisition motion can fix.