The article provides an in-depth exploration of automation testing using Selenium, Cucumber, and TestNG, focusing on the advantages of Behavior Driven Development (BDD) over traditional Test Driven Development (TDD). Cucumber, which supports BDD, allows for application behavior to be defined in plain English, enhancing collaboration between business and IT teams. The tutorial covers the setup and execution of tests using the Cucumber framework, which involves creating feature files, step definitions, and test runner files, and emphasizes the integration of Selenium for automation. Additionally, it discusses the advantages of using cloud-based solutions like LambdaTest for cross-browser testing, offering scalability, enhanced reporting, and the ability to run parallel tests, significantly reducing build times. The article concludes with a practical guide to setting up a test environment using Java and Cucumber, integrated with TestNG, for parallel test execution, highlighting the benefits of using LambdaTest for efficient testing and comprehensive analytics.