Non-functional testing is a software testing type that tests the non-functional aspects of an application, such as usability, performance, scalability, reliability, security, compatibility, and more. In contrast, functional testing focuses on testing its functional behavior., Learn what non-functional testing is, why it matters, its process, types like performance, security, and usability testing, plus best practices to deliver fast, secure, and reliable software., Non-functional testing includes evaluating a system's performance, reliability, usability, efficiency, maintainability, and scalability. Non-functional testing is crucial because it deals with aspects that impact the user experience and the application's effectiveness in the real world., Non-Functional Testing is defined as a type of Software testing to check non-functional aspects (performance, usability, reliability, etc) of a software application. It is designed to test the readiness of a system as per nonfunctional parameters which are never addressed by functional testing., Functional testing tests the application’s functionality and ensures that it works as expected, but non-functional testing ensures that the application works well enough to meet business expectations., Discover what non-functional testing is, its types, importance, best practices, and tools to ensure software performance, security, and user satisfaction..