If you are used to the old selenium-server-standalone-3.x.jar , note these major shifts in the latest versions: Downloads - Selenium
Open your browser and go to http://localhost:4444/ . You should see the Selenium Grid dashboard. Key Changes in Selenium 4 download latest selenium-server-standalone jar
Setting up the server is a "no-install" process—you simply download and run the jar file. If you are used to the old selenium-server-standalone-3