How the server really handle the response to a http request?

I understand that the server send website components to the client after http request, HTML, CSS, Js and other static files that are necessary to build the website in the client browser.

I want to understand what the server actually do to generate the response since it should handle many requests not just one request??

I assume that the server create an instance from the files and send it to the client via http response?? is this right, wrong,inaccurate or incomplete or are there other processes that happen on the server to make it work??