Browser automation is done to handle smoke tests. The goal is to automate frequently done operations so that human involvement is as minimal as possible. Selenium is an open-source browser automation tool that automates the firing of javascript events, API calls, mounting of front-end components, and many other manually done processes. Selenium has Web drivers, Tool suits, etc, and can run on Linux, Windows, and Mac. It also supports various programming languages such as Java, C#, PHP, Python, Ruby, and many more. Selenium plays a very important role in the CI/CD pipeline and is suitable for Agile software development.