Nest Many Elements within a Single div Element

Summary

Any markup with information about your page would go into the head tag (what the user does not see).
Any markup with the content of the page would go into the body tag (what the user does see). Metadata elements, such as link, meta, title, and style, typically go inside the head element.
Final Code

<!DOCTYPE html>
<html>
  <head>
    <title>The best page ever</title>
  </head>

<body>
  <h1>The best page ever</h1>
  <p>Cat ipsum dolor sit amet...</p>
</body>
</html>