Quality testing plays a critical role in software development projects by ensuring that the final product meets the specified requirements, functions correctly, and delivers a positive user experience. Through rigorous testing, defects and issues can be identified and addressed early in the development lifecycle, reducing the risk of costly errors and rework later on. Quality testing helps improve the overall quality and reliability of the software, enhances customer satisfaction, and minimises the likelihood of post-release issues. By detecting and fixing bugs before deployment, testing contributes to project success by increasing efficiency, reducing development time and costs, and maintaining the reputation and credibility of the development team and organisation.