A Top-Level Domain (TLD) is the last part of a domain name, appearing after the final dot. For example, in the domain name "example.com," the TLD is ".com." TLDs are categorized into two main types: generic TLDs (gTLDs), like ".org" and ".net," and country code TLDs (ccTLDs), such as ".uk" for the United Kingdom and ".jp" for Japan. TLDs play a crucial role in the Domain Name System (DNS), helping to identify the nature or origin of a website. They are managed by organizations like the Internet Corporation for Assigned Names and Numbers (ICANN), which oversees the allocation and regulation of TLDs globally.