This document provides information on the anatomy of URLs and best practices for SEO-friendly URLs. It explains the different components of a URL, including the protocol, subdomain, domain, top-level domain, folders/paths, page, and anchors. It recommends using hyphens to separate path and page keywords, and notes that keyword effectiveness decreases with increased URL length and position within the URL. The document also lists popular top-level domains, country code top-levels, and file extensions.