The top level domain name, or TLD, is the part of the domain name of a web site after the last period.
The top-level domain name, or TLD, is the part of a domain name that is after the last "dot." For example, the "com" in "paydirtdesign.com" is the top level domain name for our domain.
When you register a domain name for the web site for your business or organization, choosing a top level domain name is part of that decision process.
You will need to choose whether you want to stick with a ".com" name, which is very popular - and which many internet users assume will be in your domain name, or if you want to stick with a preferred name and maybe choose a less commonly used TLD, like ".org" or ".info."
Of course, choosing a different TLD for your domain name can also provide information about your organization. Global Top-Level Domain Names are intended to reflect the purpose of your site, while Country-Code Top-Level Domain Names indicate which country you are intending to do business in.