I saw this code in a web program where it is written as –
<h4 class="h5 text-muted mt-3"> File </h4>
I don’t understand that why 2 headings are applied to the text word ‘File’ above? If the styles of class are overwriting the style of , then why use the author used the ‘H4’ in the first place?

I tried the following code instead & got the same result as above:
<h5 class="text-muted mt-3"> File </h5>

That is why my question is- why not directly use the ‘h5’ tag instead of the earlier method of using h5 class inside h4 tag??

If someone can throw some light on these, I’ll be grateful..