Automated functional testing is crucial in today's digital economy to ensure that software products meet client requirements and function smoothly without bugs, thus protecting the organization's reputation and avoiding financial losses. This form of testing verifies the features of a software product against client-requirement documentation such as Software Requirements Specification (SRS) and Business Requirements Specification (BRS), using both manual and automated methods to achieve maximum coverage. Functional testing focuses on usability, error checking, and comparing actual outcomes with expected results, while also distinguishing itself from non-functional testing by prioritizing functionality over aspects like scalability and speed. Automated functional testing enhances productivity and coverage by allowing for the execution of numerous scripts, although it cannot entirely replace manual testing due to certain scenarios that require human observation. Tools like LambdaTest facilitate cross-browser functional testing, offering a cloud-based infrastructure to test applications across various devices, operating systems, and browsers, ensuring a seamless user experience across different platforms.