If you have your own website, you will have some form of a webhost providing the service that allows you to store the information contained within your site to be accessible over the internet. Some ISPs supply free webspace, which is not the sort of hosting this article covers. If you own a domain name, you will need an independent hosting provider.
You will need a domain name (the address you would type in to access a website, i.e. www.pcreview.co.uk), which can be registered from domain registrars. The price of a domain name depends greatly on the domain type (.com, .net, .co.uk, etc...) and the type of registrar. Registerfly and GoDaddy are popular registrars that have some of the best prices and features.