The simplest definition what a web hosting is that it is merely just likes renting space on a web server. In fact, a website is not simply a domain name and which only means that it is a collection of files that are linked together by HTML code to display text, images and graphics on a computer. And in order for anybody to see this collection of files you have created, it has to be hosted on a certain VPS Hosting or Dedicated Server that has an access to the internet. It is not just any computer will do, there should have a web server set up with special software that allows it to receive requests from the internet for the website files it has stored on it and to send those files out over the internet so that the requesting computer can display them.
To sum it up, it is just like a service crew or waiter on a certain food chain or restaurant and bringing the order that you ask for from the chef or kitchen which can be referred as the server itself. Looking for the best that offers Cheap Web Hosting would definitely just to simple for as long as you know how web hosting works.