Dynamic Application Security Testing (DAST) is a method for evaluating the security of running applications by simulating attacks to identify vulnerabilities, without requiring internal knowledge of the application or its source code. Unlike Static Application Security Testing (SAST), which analyzes source code for vulnerabilities, DAST assesses the application as a whole in its runtime environment, detecting issues like SQL injections and Cross-Site Scripting (XSS) that may not be visible in the code alone. DAST plays a crucial role in enhancing the security posture of complex, modern applications and can be integrated with existing security and DevOps tools in a DevSecOps framework. Harness Security Testing Orchestration (STO) further extends the capabilities of DAST by allowing seamless integration with CI/CD pipelines, enabling developers to conduct DAST scans with minimal configuration, using built-in tools like the Zed Attack Proxy (ZAP). STO aids in rapidly addressing vulnerabilities through intelligent prioritization, deduplication, and AI-driven remediation guidance, thus facilitating a shift-left approach in application security testing.