Dynamic application security testing (DAST) is a proactive approach to software security that involves testing deployed applications in real-time to identify vulnerabilities by simulating real-world attacks. As the cybersecurity landscape evolves, DAST has become a vital component of continuous integration and continuous delivery (CI/CD) pipelines, helping to maintain robust security while supporting the rapid pace of modern software development. Unlike static application security testing (SAST), which examines unexecuted code, DAST analyzes running applications, uncovering vulnerabilities such as SQL injection, cross-site scripting, and broken authentication. By integrating DAST with CI/CD tools like CircleCI, organizations can automate security checks, enhance compliance with regulations like PCI DSS and GDPR, and ultimately improve their overall security posture. However, DAST should be part of a broader DevSecOps strategy that includes other methodologies like SAST, interactive application security testing (IAST), and software composition analysis to ensure comprehensive protection against potential threats.