The text discusses nine key metrics for measuring success in a Software as a Service (SaaS) business model. These include Monthly Recurring Revenue (MRR), Annual Recurring Revenue (ARR), Average Revenue per Account (ARPA), Lifetime Value (LTV), Customer Acquisition Cost (CAC), Customer Churn Rate, Net MRR Churn Rate, Activation Rate, and Net Promoter Score (NPS). The article explains how to calculate each metric and provides recommendations for improving them. It also emphasizes the importance of monitoring these metrics regularly to ensure business sustainability and growth in the highly competitive SaaS industry.