In the context of the internet, domains refer to the human-readable addresses used to identify and access websites and other online resources. A domain is part of the Domain Name System (DNS) and consists of a unique name followed by a domain extension, such as .com, .org, or .net.

A domain name typically includes two main components: the second-level domain (SLD), which is the primary name chosen by the organization or individual (e.g., "example"), and the top-level domain (TLD), which denotes the type or origin of the domain (e.g., ".com" or ".uk"). Domains provide a way for users to easily locate and connect to websites without needing to remember complex numerical IP addresses.