Understanding the distinction between software testing and quality assurance (QA) is crucial for improving software delivery outcomes. While software testing is a structured process of evaluating software applications to ensure they meet user requirements and perform reliably, QA is focused on maintaining and improving the development process itself to consistently deliver high-quality results. Testing is primarily concerned with identifying and addressing defects in the software, whereas QA aims to prevent defects by enhancing and standardizing processes across the development lifecycle. The integration of both disciplines allows for early detection of issues, reduces risks, and ensures that the software meets user expectations, ultimately enhancing product quality and reliability. Software testing involves activities like test planning, execution, and defect management, while QA emphasizes process audits, training, and compliance monitoring to improve development practices. Both fields are complementary, with testing being more reactive and product-focused, and QA being proactive and process-oriented, together fostering a system that supports reliable and efficient software delivery.