Web application testing evaluates a web-based software application to ensure its functionality, performance, security, and usability meet specified requirements. It involves systematically examining various components and features of the web application to identify defects or areas for improvement, aiming to enhance its quality and reliability before release.
API testing involves verifying the functionality, performance, security, and reliability of application programming interfaces (APIs). It ensures that APIs operate as intended, handle various inputs and loads efficiently, and maintain security standards.
Mobile application testing involves evaluating the functionality, performance, usability, and security of mobile apps for platforms like Android and iOS. It ensures apps work smoothly across devices, handle various conditions, and provide a seamless user experience.