What is a server and how does a server works? 

A server is a computer or several computers that have a large capacity and store a large amount of information. The server is always on and connected to the network (either a local network or the Internet) to process user requests and provide the necessary information. The more information the server stores on the hard disk and the more users who send the request, the more powerful the server should be. 

All sites on the Internet are located on servers, such server hosting is provided by world renowned companies like the-online.com web hosting company in usa. If a site contains a small number of pages and information, then there may be a lot of such sites on one server. If the site contains and processes a huge amount of information, then it is located on a separate server, and in fact it is a server itself. For example, search engines Google, Yahoo, Gmail etc we Can say that all the pages of all sites on the Internet are located on the servers of these companies. In this case, the concept of server is a large number of computers (servers) connected to each other and working in parallel, in order to ensure fast processing of the search query and output of the result.