A Headless Browser is a web browser without a graphical user interface, used for automated browsing and web scraping. Headless browsers, such as Puppeteer and Selenium, allow scripts to interact with web pages programmatically, simulating user actions like clicking, scrolling, and filling out forms. They are particularly useful for scraping dynamic content that relies on JavaScript to render data, as they can execute scripts and interact with the DOM just like a regular browser. Headless browsers are essential tools for testing web applications and extracting data from complex, interactive websites without the overhead of a visual interface.