Mastering upsell and cross-sell techniques can maximize the potential of a SaaS business by increasing its average order value (AOV) and revenue. Upselling involves selling a better version of what customers already have, while cross-selling entails offering related products. These methods not only increase revenue but also improve customer lifetime value (CLV) and reduce churn by enhancing the service value. Key strategies for upsell and cross-sell in SaaS include knowing your customers, segmenting them, offering compelling products, encouraging upgrades, and listening to feedback. Upselling and cross-selling can contribute to a 10% revenue boost by enhancing customer loyalty and monthly recurring revenue (MRR).