Lets say that you want to have a web page or a blog and you just finished it on you computer, now what?
You have to put it on the internet, but how?
This is were you need a web hosting company. A web hosting service lets you make your website accessible in the Internet. From the Web hosts you rent space on a server they own with Internet connection. Web hosts can also provide data centre space and connectivity to the Internet for servers they do not own to be located in their data centre, called colocation.
There are many kind of hosting services. The most basic is a small web page service. Many web hosting companies are also Internet service providers (ISPs). Sometimes they offer their services free to their subscribers. But if you use the free service you will get ads on your page. But if you pay the fee you wont be bothered by that.
So if you have a webpage or blog you need to publish it on the internet, web hosting companies offer this service.