Net revenue retention (NRR) is a crucial metric for subscription-based businesses, enabling them to assess the revenue retained from existing customers, factoring in expansions through upselling and cross-selling, as well as contractions from downgrades and churns. A high NRR indicates successful customer retention and revenue growth from existing clients, serving as a key performance indicator alongside gross revenue retention (GRR), which does not account for upsells. While NRR is particularly relevant to subscription models, it applies to any business with repeat customers and provides insights into customer loyalty, churn, and the efficiency of pricing strategies. Companies with high NRR, such as Salesforce, HubSpot, and Netflix, often emphasize customer satisfaction, effective upselling strategies, and responsive customer support to sustain growth and profitability. Despite being a strong growth driver, NRR should be considered alongside customer acquisition, as a balance between retaining existing customers and acquiring new ones is vital for long-term stability.