What Does Top-Level Domain (TLD) Mean?
Top-level domain (TLD) refers to the last segment of a domain name, or the part that follows immediately after the “dot” symbol.
Techopedia Explains Top-Level Domain (TLD)
ARPANET created TLDs to allow humans to ease the process of memorizing IP addresses. Instead of using a series of digits for each computer, the domain name system was established to organize addresses in a more user-friendly way.