A domain name extension is the part of a web address that comes after the period, such as ".com" or ".org". These extensions are also known as top-level domains (TLDs).
There are several different types of domain name extensions, including generic TLDs (gTLDs) such as ".com" and ".org", and country-code TLDs (ccTLDs) such as ".uk" and ".us". gTLDs are intended for general use, while ccTLDs are associated with a specific country.
The use of different domain name extensions can provide valuable information about a website. For example, a ".com" extension typically indicates a commercial website, while a ".org" extension often indicates a non-profit organization. ccTLDs can also provide information about a website's geographic location.
In conclusion, domain name extensions are an important part of web addresses. They provide information about the type and location of a website, and can help users understand the purpose and content of a site before visiting it.