Functional testing is the most important testing for any technology, language or project. Project is bases upon different features and process flow which gets complied with technology and frame work. Functional testing will audit that all of above are in place as per the technology standards.
It also offer detailed testing modules for end to end processing of different functional aptitude of the portal or website. It gave motion base picture of bugs, issues, error and content issues. It also check hoover, pixel perfect deployment of designing along with site flow and UI plan.