Selenium is a new generation automation testing tool to automate web based application/Mobile application. It is also the core technology in countless other browser automation tools, APIs and frameworks. In the current competitive world, manual testing is getting obsolete, because of the time to market hence companies looking for technical professionals who can handle Automation efficiently which result in cost reduction. It’s open source tool, evolving day by day with the help of automation experts. Hence tool has a bright future in long run.