The World Wide Web is a massive collection of web sites, all hosted on computers (called web servers) all over the world. The web server (computer) where your web site's html files, graphics, etc. reside is known as the web host. Web hosting clients simply upload their web sites to a shared (or dedicated) webserver, which the ISP maintains to ensure a constant, fast connection to the Internet.

A Web Hosting company provides you space on their web server which allows you anyone on the Internet to view your web site. Web Hosts charge on a monthly basis and provide differing levels of service.