One well-liked open-source web application testing tool is called Selenium. It works with several programming languages, including Java, Python, and C#, and supports browsers like Chrome, Firefox, and Edge. With Selenium, testers can automate routine tasks, reduce errors, and make the testing process faster. Taking a Selenium Course in Chennai at FITA Academy gives professionals practical experience in test automation, building frameworks, and working on real projects, helping them start or advance their careers in software testing.