In the article, we will tell you in simple words about the purpose of a domain name and what a domain is on the Internet. Let's define the term "domain". Let's look at how the domain differs from the site and why the site needs the domain.

Domain (in computer science) is the name of the site. By typing a certain combination in the browser line, for example, "blitz-host.com ", we will get to the site:

Domain (domain name, domain address) — the "name" of the site. The concepts of "domain" and "site" are often confused, but they are not the same thing. A website is a web page that is displayed on the Internet, i.e. content. And the site domain is its unique "address". If your site doesn't have a domain, users simply won't find their way to it and won't see the content.

What does a domain name consist of?

All domains are arranged hierarchically: they consist of parts (levels). Third-level domains are created on the basis of second-level domains, and second-level domains are created on the basis of first-level domains. Let's get acquainted with the types of domains closer:

• The domain of the second (third, fourth, etc.) level or subdomain is the left part of the domain up to the point. In practice, this is any combination of characters that we come up with for the name of our future site (youtube.com, market.yandex.ru).
• The first-level domain or domain zone is the right part of the domain after the dot. No one can ask this part except ICANN. By registering a "domain", we come up with a second-level domain and select a zone. They can be geographical (.RU - Russia, .EU — EU countries, .AC - Ascension Island, etc.) or thematic (from old-timers like .COM. - commercial sphere, .BIZ - business areas up to new gTLD: .FLOWERS, .HEALTH, .CHILDREN, etc.).
• The zero-level domain is the point after the domain zone (blitz-host.com .), which is not displayed in the address bar and is omitted when entering the domain in the browser bar.