Your comment should be below the h2 element and start 6 spaces over from the start of the line.

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

  **Your code so far**
<html>[spoiler]This text will be blurred[/spoiler]
<body>
  <h1>CatPhotoApp</h1>
  <main>
    <h2>Cat [spoiler]This text will be blurred[/spoiler]
[details="Summary"]
This text will be hidden
[/details]

[details="Summary"]
This text will be hidden
[/details]
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/103.0.0.0 Safari/537.36

Challenge: Step 6

Link to the challenge:
https://www.freecodecamp.org/learn/2022/responsive-web-design/learn-html-by-building-a-cat-photo-app/step-6[quote=“Pranshu1sati, post:1, topic:513198, full:true”]
Tell us what’s happening:
Describe your issue in detail here.

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

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0

Challenge: Step 6

Link to the challenge:

[/quote]

I think you’ll want to restart the step to get the original HTML and formatting back. Then, the only thing you will want to do is use your space bar to add two more spaces in front of the three child elements of main, which are the h2, comment, and p. That’s it, nothing else.