A domain name in short is your website name. A domain name is the address where Internet users can access your website. A domain name is used for finding and identifying computers on the Internet. Computers use IP addresses, which are a series of number. Domain names are used to identify these IP addresses.
Every domain name has a suffix that indicates which top level domain (TLD) it belongs to. There are only a limited number of such domains.
The only way to register and start using a domain name is to use the services of a domain name registrar. The domain name industry is regulated and overseen by ICANN, the organization that is responsible for certifying companies as domain name registrars. Only a domain name registrar is permitted to access and modify the master database of domain names maintained by InterNIC. The master database contains the documentation on all of the domain names registered to date. InterNIC provides a list of accredited domain name registrars.
The registrar you choose will determine the cost for registering a domain name, but in general expect to pay a yearly fee. Some registrars will offer discounts if you register for more than one year, but no registrar has the authority to sell more than a 10-year registration contract for any domain name. The registrar will ask you to provide some contact and technical information to have on record. This information is stored in a registry, which other computers can access to find information on your site.
Choose a domain name. Use the registrar website to check its availability. If your domain name is not available, think about other options (e.g. company name, or the names of products or services you offer).
Once your domain name is available follow the registration instructions. Services, charges, terms and conditions may vary from registrar to registrar, so check differences carefully.