What is Selenium Grid? Selenium Grid is a part of the Selenium Suite that specializes on running multiple tests across different browsers, operating systems, and machines in parallel . Selenium Grid has 2 versions – the older Grid 1 and the newer Grid 2. We will only focus on Grid 2 because Grid 1 is gradually being deprecated by the Selenium Team. Selenium Grid uses a hub-node concept where you only run the test on a single machine called a hub , but the execution will be done by different machines called nodes . When to Use Selenium Grid? You should use Selenium Grid when you want to do either one or both of following : · Run your tests against different browsers, operating systems, and machines all at the same time. This will ensure that the application you are testing is fully compatible with a wide range of browser-OS combi...