Selenium is a free, open-source automated testing framework for web applications that runs on a wide range of browsers and operating systems. Manual testing is a method of software testing in which testers do all test cases manually, without the use of any automation technologies. This sort of testing aids in the detection of bugs, malfunctions, and faults in web applications. It's a tried-and-true approach of finding major software flaws. Manual testing methods were used to test apps before automation testing because all new applications must be tested multiple times before being used. Read this blog for what is selenium testing. manual testing use selenium testing