As you all know Domain name is unique identification which given to access your website from vast number of sites in cyber space. Although There are so many providers who giving domain names for free, you have to buy a domain name if you really want to get rid of adds and other things which placed by the domain name providers. If I get an example yahoo provides domain names for free, while they selling domains. If you buy Domain names from yahoo they provide lot of services rather than getting it for free.