Some one explain Step 6 of HTML

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
<html>
<body>      
     <h1>CatPhotoApp</h1>   
    <main>           
    <h2> cat photos </h2>
    <!--  TODO: Add link to cat photos  -->
    <p> Click here to view more cat photos. </p>
    </main>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Challenge: Step 6

Link to the challenge:

<main>
      <h2>Cat Photos</h2>
      <!-- TODO: Add link to cat photos -->
      <p>Click here to view more cat photos.</p>
    </main>

you have to give 2 spaces to the nested element which are h2 tag and p tag and the comment basically giving two spaces to nested elements makes the code easier to read