Selenium and NodeJs are a popular combination for web automation testing, offering an open-source and widely-used cross-browser testing tool. NodeJs is a text-based open-source programming language that unifies web application development around a single programming language. The two technologies make a great combination as they are easy to implement and can be integrated into a single repository. To get started with Selenium and NodeJs, prerequisites include having a machine with node setup and npm installed, selenium-webdriver package for running Selenium configurations, Chrome driver package, Mocha assertion library, and setting up node and npm. The project directory is created, and the necessary files are added to it. Configuring Selenium with Node involves installing the selenium-webdriver package, downloading drivers for the WebDriver, and adding them to the system's PATH variables. Adding Mocha assertion library enables asserts and verifications in Selenium test automation tests. A demonstration of running a simple program using Selenium and NodeJs is provided, along with an example of parallel test execution on cloud-based Selenium Grid using LambdaTest.