A Functional Test is a type of software testing that evaluates a system's functionality against specified requirements. It focuses on what the system does, ensuring that all features work as intended. This testing is typically performed by executing test cases that cover various scenarios, including user interactions and system responses. The primary goal of functional testing is to identify any discrepancies between the actual output and the expected output. It can be applied to different software components, including web applications, mobile apps, and APIs. By validating the functionality, it helps ensure a reliable and user-friendly experience.