Non-functional testing evaluates the attributes of a system, such as performance, security, usability, and compatibility, rather than specific functionalities. It focuses on how the system behaves under certain conditions.

It ensures that the software meets quality standards in terms of performance, security, and user experience, which can be critical for user satisfaction and system reliability.

Performance Testing: Measures system responsiveness and stability under various conditions. Security Testing: Identifies vulnerabilities and ensures data protection. Usability Testing: Assesses how user-friendly the application is. Compatibility Testing: Checks functionality across different devices, browsers, and operating systems.