Hello everyone can please tell me how to give your image an alt text

HTML-CSS
1 
<img src='//cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com/freecodecamp/original/3X/6/1/61a3499c5abb165be990aa0c1abd23342e60c663.jpg'>
<h2>CatPhotoApp</h2>
<main>
  
  
  <p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
  <p>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>
</main>
2

The alt text given to img is <img src="" alt="">