The document breaks down the anatomy of a URL into its component parts: - The subdomain comes before the main domain name. Common subdomains include "www". - The domain name is the main identifying part and comes between the subdomain and top-level domain. - The top-level domain (TLD) comes at the end of a domain name and includes popular TLDs like .com, .org, .edu. Together the subdomain, domain name and TLD make up the full domain name, which identifies a specific website.