Learn HTML by Building a Cat Photo App - Step 1

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

Your code so far

<html>
  <body>
    <h1>Hello World</h1>
  </body>
</html>

Your browser information:

User Agent is: Mozilla/5.0 (Linux; Android 11; SM-A127F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Mobile Safari/537.36

Challenge: Learn HTML by Building a Cat Photo App - Step 1

Link to the challenge:

hello, welcome to the forum!
if you are stuck on step 1, try looking at this post for help.
Let us know if you are still stuck after.