Selenium WebDriver, an essential tool for automating web application testing, allows testers to simulate user interactions such as mouse and keyboard actions through its Action Class. This class provides methods for various mouse actions, including clicking, double-clicking, context-clicking, hovering, and dragging elements within a webpage. To perform these actions, testers create an instance of the Action Class and pass the WebDriver instance to it, enabling a series of actions to be executed in sequence. Key methods like `click()`, `doubleClick()`, `contextClick()`, `moveToElement()`, and `dragAndDrop()` facilitate the automation of complex interactions, such as navigating hover menus or adjusting sliders. The blog also explores the differences between various approaches to drag-and-drop operations, emphasizing the flexibility and precision offered by Selenium's Action APIs. Despite the enhancements in Selenium 4, the foundational mouse actions remain crucial for building robust automated test scripts.