Quality Assurance (QA) in software development is often misunderstood, with common myths suggesting it's non-technical, unnecessary, and can be deferred until the end of a project. Contrary to these beliefs, QA is a critical, technical, and collaborative discipline that requires an understanding of code, architecture, and a quality mindset across all development roles, from developers to product managers. While some believe QA can be performed by anyone or that it's a simple, monotonous task, effective QA involves strategic planning, a mix of manual and automated testing, and an ability to identify potential issues early in the development cycle. Performance testing should be integrated throughout the development process rather than left until the end. Additionally, the perception that QA is too costly or adds no value overlooks the fact that neglecting quality assurance can lead to more significant expenses and revenue loss due to unresolved defects. The text emphasizes that QA is not just for the QA team but is a shared responsibility, essential for delivering a high-quality product that meets user expectations.