A domain name is a unique name that identifies a website. Each website has a domain name that serves as an address, which is used to access the website.
Whenever you visit a website, the domain name appears in the address bar of the web browser. Some domain names are preceded by "www" (which is not part of the domain name), while others omit the "www" prefix. All domain names have a domain suffix, such as .com, .net, or .org.