Puppeteer is a Node.js library used for automating web page interactions. It provides a high-level API to control Chrome or Chromium-based browsers, enabling developers to automate browser tasks, generate screenshots and PDFs, crawl web pages, and perform end-to-end testing. This library becomes extremely useful when doing web scraping as it allows you to execute website JavaScript and even hide the fact that you are using a browser automation library via puppeteer-extra-plugin-stealth and similar plugins.