I do not understad the ul and li can someone help me

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

  **Your code so far**
<html>
<body>
  <h1>CatPhotoApp</h1>
<ul> <li> Child element 1 </li> <li> Child element 2 </li> </ul>   <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/103.0.0.0 Safari/537.36

Challenge: Step 6

Link to the challenge:

Those aren’t meant to be used in your solution. They are just an example of how indenting HTML can make it more readable.

I would restart the step to get the original HTML and formatting back. Then, the only thing you want to do is use your space bar to add two more spaces in front of each of the three child elements in main. That’s it.