title: Nodejs/Puppeteer - How to use page.evaluate
body: <p>I know is a noob question, but I want to know when I should use page.evaluate</p>
  
  <p>I also know the documentation exists, but I still do not understand</p>
  
  <p>Can anybody give me an explanation about how and when to use this function when creating a scraper with puppeteer?</p>