The World Wide Web WWW is a collection of pages that incorporate text, graphics, sound, animation and interactive applications. Pages contain hypertext, which means that they can contain links to other pages. The primary web page for an organization is called its home page. Users run client applications, like web browsers. Content providers run server software on hardware that is also called a server.
Clients send requests to servers, get back replies.
Computing is the name of the folder the file is in. The suffix html indicates that this file contains HTML code. The browser sends the request over the network. The network uses the machine name to deliver the request to the right server. The server uses the file name to find the right file.