TestNG is a Java testing framework used to drive Selenium automation scripts, making it a popular choice for automation testers. This guide provides a step-by-step process for beginners to create their first automation test script using TestNG, starting with setting up the test automation environment in Eclipse and downloading necessary tools like Java, Eclipse, TestNG, and Selenium. The guide details the process of writing and running a simple TestNG script to verify a webpage's title and highlights the benefits of using cloud-based tools like LambdaTest for cross-browser testing, which allows users to perform tests on over 3000+ browser versions without needing to install them locally. Additionally, it covers running Selenium scripts on the LambdaTest Selenium grid and executing parallel automated tests using TestNG on LambdaTest, offering insights into enhancing test coverage and efficiency through cloud testing.