What is web hosting ? What is its significance ?

Web Hosting is a means of hosting web-server application on a computer system through which electronic content on the Internet is readily available to any web-browser client.
The significance of web hosting is that web hosts allow their customers to place web documents, such as HTML pages, graphics, and other multimedia files, onto a special type of computer called a web server. This server maintains constant, high-speed connections to the backbone of the Internet.