Functional testing is a sort of black-box testing that evaluates a system's or component's compliance with stated functional criteria. What the system performs is specified through functional testing. The test, as the name implies, ensures that all of the application's capabilities are operating as intended and are ready for release. Because it is black box testing, the tester will not be aware of the app's underlying structure or source code. TestForma is the best functional testing tool for organizations, allowing them to give higher-quality apps to their consumers while reducing expenses and possible risks. As a result, functional testing has grown in importance in ensuring the quality of software products.