The Internet domain, or domain name, acts as the location of a website on the web. Once a user enters your domain name in the search bar, their device is able to identify the address to send the request to, which results in your website being opened and accessed by them.

Domains are crucial for any online presence as they provide a unique identity that users can remember easily. Additionally, they serve as key components of email addresses, making it easier for individuals and businesses alike to communicate online. With the right domain name, you can establish a strong online brand and make it easier for potential customers to find and engage with your business.

The Domain Name System (DNS) is responsible for organizing the entire domain name space of the Internet. This allows all domains to be managed within a single hierarchical system, and identified through their corresponding servers' physical IP addresses (since one server can host multiple sites with unique addresses). Each fully qualified domain name can consist of multiple levels, which are defined by a fully qualified name (FQDN) that includes all level names written left-to-right, separated by dots, and ending with the domain zone. As an example, mesample.qtw-03.office2.exmpl.com has com as the top-level, exmpl as the second, and mesample as the fifth level.

DNS plays a crucial role in making the Internet accessible and navigable for users. By having a centralized system for organizing domains, it becomes much easier to locate and access specific websites, regardless of their physical location or server configuration. Additionally, the use of FQDNs allows for more detailed and granular domain names, which can aid in better organization and management of websites and online services.

An IP address is assigned to every website, but because it's a series of numbers, it's hard to remember. In order to provide a simple domain name which is easy to remember and access, each site also has its own domain name that is entered into the search bar.

For example, in dnray.com, the .com is considered a first-level domain while dnray is the second-level domain. First-level domains, also referred to as domain zones, are used to denote geographical affiliation (such as de for Germany, by for Belarus, ua for Ukraine, and uk for the UK), or the type of site (such as com for commercial sites, info for informational sites, and edu for educational resources). The second-level domain is determined by the site owner.

Domains cannot be purchased, only rented. The registration and management of first-level domain names is handled by the international organization ICANN (Internet Corporation for Assigned Names and Numbers), which oversees the introduction of new first-level domains in coordination with businesses and states.

Domain name registrars can be used to register a domain, but there are certain rules that must be followed. For example, for the ru top-level domain, the name must be between one and 63 characters long, using only Latin letters. Using the Whois service, you can check whether your desired domain name is available for registration.

An easily memorable domain name can play a significant role in driving traffic to a website and attracting potential customers to a business. Having a unique and distinctive domain name can also create a strong brand identity that sets you apart from competitors.

A domain name is a unique alphanumeric identifier that represents an internet address.
It is used to locate and identify websites on the internet. For instance, "example.com" is a domain name. It consists of two parts: the top-level domain (TLD), such as ".com", and the second-level domain (SLD), such as "example". Together, they form the complete domain name. Domain names make it easier for users to remember and access websites without needing to remember numerical IP addresses.