what does alt mean

HTML-CSS
#1

Tell us what’s happening:

Your code so far


<h2>CatPhotoApp</h2>
<main>

<img src="https://www.freecatphotoapp.com/your image.jpg"alt="fcc-relaxing-cat

<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>

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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36.

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#2

alt is used to define alternative text for an image…
In case if for some reason your image can’t be displayed on the webpage, text inside alt attribute is shown as to give clue to the user about what image was…
Here’s an example
<img alt="My alt text" src="pic.jpg">

will give following html:
My alt text

regarding your code

you’ve not closed " for alt text and then not closed the img tag
you should write:

<img src="https://www.freecatphotoapp.com/your image.jpg"alt="fcc-relaxing-cat">
#3