The tutorial provides a comprehensive guide on handling multiple windows in Selenium WebDriver using Java, focusing on identifying and managing parent and child windows within web applications. It introduces key concepts such as window handles, which are unique identifiers used to switch control between browser windows, and outlines methods like `getWindowHandle()`, `getWindowHandles()`, and `switchTo()` for navigating between windows. The tutorial includes practical code examples demonstrating how to implement these techniques using the LambdaTest cloud-based Selenium Grid, which facilitates testing across various browsers and operating systems. Additionally, it covers strategies for switching focus back to the parent window and efficiently closing multiple windows using methods like `driver.quit()`, providing a robust framework for automating window management in Selenium tests.