Before handing over the final product, I conduct thorough QA to ensure the application is bug-free and functions smoothly across major browsers (Chrome, Firefox, Safari, Edge) and devices (Windows, macOS, iOS, Android). This includes checking layout consistency, interactive elements, form validation, API responses, and performance benchmarks. I compile and share a QA report outlining what was tested, any fixes applied, and screenshots or notes to validate the stability of the final build.