AARRR is a framework for tracking key metrics across the five stages of customer experience: acquisition, activation, retention, referral, and revenue. It helps businesses identify areas to optimize their sales funnel by measuring performance and making data-driven decisions. By focusing on AARRR metrics, companies can increase revenue without increasing acquisition costs. The framework consists of a set of questions for each stage, allowing businesses to track various metrics such as website visits, bounce rates, and customer retention. It enables businesses to determine which levers to pull to generate more revenue by analyzing performance data. By using the AARRR model, businesses can improve their activation and retention rates through strategies such as sending more emails, creating sales tasks, streamlining onboarding processes, and using incentives. The framework is simple yet comprehensive and customizable, allowing businesses to tailor it to their specific needs.