Selenium automates browser That s it! What you do with this power, is up to you! Selenium Grid is one of the components of Selenium which allows users to run tests in parallel on multiple browsers, multiple operating systems, and machines. Running Tests in parallel reduce the time and cost of execution of tests and results in better ROI. Through hands-on, practical experience, you will go through concepts like Setting up Selenium Grid hub and node network and running Selenium tests parallelly on multiple browsers.