Selenium is a free, open-source, automated testing framework that helps in validating web applications across various different platforms and browsers. Multiple programming languages like Java, C#, Python, etc., can be used to create Selenium Test Scripts. Selenium is not just a single tool, but a set of software where each piece caters to a different testing requirement of an organization. Selenium consists of the tools like Selenium Integrated Development Environment (IDE), Selenium Remote Control (RC), WebDriver, and Selenium Grid