A quality development cycle requires prompt and reliable feedback. Stop waiting hours to get the results of your web acceptance builds. Selenium Grid transparently distributes your tests on multiple machines so that you can run your tests in parallel, cutting down the time required for running in-browser test suites. This will dramatically speed up in-browser web testing, giving you quick and accurate feedback you can rely on to improve your web application.
Selenium Grid is a server that allows tests to use web browser instances running on remote machines. With Selenium Grid, one server acts as the hub. Tests contact the hub to obtain access to browser instances. The hub has a list of servers that provide access to browser instances (WebDriver nodes), and lets tests use these instances. Selenium Grid allows to run tests in parallel on multiple machines, and to manage different browser versions and browser configurations centrally (instead of in each individual test).