Automation testing can be approached through two primary methods: Record & Replay and Scripting. Record & Replay testing is ideal for black box testing of applications with a static user interface, allowing testers without coding expertise to quickly set up automated tests. However, it may struggle with frequent UI changes and can produce large, unwieldy scripts. In contrast, scripting, particularly with tools like Selenium, requires programming knowledge but offers more robust, customizable, and scalable testing solutions, suitable for stress and regression testing. Scripting allows for precise control over test cases and is better suited for projects with complex requirements or frequent updates. The choice between these methods should be based on project timelines, team expertise, and the need for parallel testing to ensure cross-browser compatibility.