To start with this first blog will explain that it is an Internet domain, Internet domains translates IP addresses of web pages with names that we remember to enter them easily, for example if there were no domains could only get to google http://126.96.36.199/ is through the most used and known domains are. com,. net and. org but there are also many more like those used by the government. gov, or regional such as have. com.co of Colombia .co is Spain .es., ar. Argentina in order so as such there are many other domain extensions, if you want you'll have to register a domain, most domains are extra but not much money domains are also free. The most popular pages for the registration of domains are name.com godaddy.com and there you will find a good price domains and many extensions.