Selenium is an open-source tool for testing via automated functional testing and like all other testing tools, Selenium is also even used for load testing, which is a part of performance testing and not functional testing, as it propagates the reuse of functional tests which are already existing and also run them having concurrent users virtually. Now before we deep dive into Selenium let us get a hang of what eventually load testing means and some relevance to the real-life load testing so that we can appreciate the job of Selenium even more!