IAST is an interactive application security testing approach that harnesses real-time context and user interactions to pinpoint vulnerabilities in software applications. It offers several compelling advantages over traditional static security solutions, including real-time vulnerability detection, better accuracy, insight into the flow and behavior of applications, effective in complex environments, and broad applicability across various stages of the software development lifecycle. IAST can be used in production environments and detects a wide range of vulnerabilities, from SQL Injections to intricate business-logic vulnerabilities. It is poised to become the gold standard in application security with the power of AI and machine learning, offering an airtight security fabric around software assets when integrated into observability platforms like New Relic.