Why do online stores give the product page in html and is it necessary to do so?

Question

HTML

Why do online stores give the product page in html and is it necessary to do so? I mean, is it necessary to generate an html file for the user? Isn't it easier to just give a php page?

Answer 1

Postfixing .html in a link does not mean that the page is not generated by PHP.

Answer 2

so that the browser understands the html markup and shows it to the user, of course.
php code is executed on the server and generates just html markup that is understandable to the browser.
need.