title: What is metro bundler in react-native?
body: <p>I am learning React Native.</p>
  
  <p>I can't find a proper documentation for metro bundler. So, I have few questions on it.
  As the name suggest it creates a bundle.</p>
  
  <ol>
  <li>But where is the bundle file located ?</li>
  <li>Is this same as webpack ?</li>
  <li>What is the use of that bundle file ?</li>
  </ol>