These names are used in various networking contexts and application-specific naming and addressing purposes. In general, it represents an Internet Protocol (IP) Resource, such as a Personal Computer used to access the Internet, a server computer Hosting a Website, or the website itself or any other service communicated via the Internet.
Domain names are organized in subordinate levels of the DNS root domain, which is nameless. The first-level set of domain names are the top-level domains, including the generic top-level domains and the country code top-level domains.
Below these top-level domains in the DNS hierarchy are the second-level and third-level domain names that are typically open for reservation by end-users who wish to connect local area networks to the Internet, create other publicly accessible Internet resources or run web sites.
The registration of these domain names is usually administered by Domain Name Registrars who sell their services to the public. There are many Domain Name Registrars who sell their services to the Public at cheap prices. You can find them easily on the web.
So this is How you can get the Domain Name for your Website.