A top-level domain (TLD) is the part of a domain name that comes after the final dot (e.g., .com, .net, .org, .gov, .edu, .co.uk, etc.). TLDs are used to identify the purpose or location of a website. There are two main categories of TLDs: generic TLDs (gTLDs) and country code TLDs (ccTLDs). Generic TLDs (gTLDs) are TLDs that are not associated with a specific country. Examples of gTLDs include .com, .net, .org, .info, .biz, and .name. Each gTLD is managed by a registry, which is responsible for maintaining the list of domain names registered under that TLD. Country code TLDs (ccTLDs) are TLDs that are associated with a specific country or territory. Examples of ccTLDs include .uk for the United Kingdom, .fr for France, and .jp for Japan. Each ccTLD is managed by a designated organization in the corresponding country or territory. In addition to gTLDs and ccTLDs, there are also sponsored TLDs (sTLDs) and infrastructure TLDs (iTLDs). sTLDs are TLDs that are sponsored by a specific organization or community and are intended for a specific purpose. Examples of sTLDs include .edu (for educational institutions in the United States) and .gov (for U.S. government agencies). iTLDs are TLDs that are used for technical infrastructure purposes, such as .arpa (for the Address and Routing Parameter Area). Overall, TLDs are an important part of the domain name system and are used to help organize and identify websites on the internet.