A URL structure refers to the way a web address is organized and formatted. It typically consists of several components, including the protocol (like HTTP or HTTPS), the domain name (such as example.com), and the path that leads to specific content (like /about or /products/item1). A clear and logical URL structure helps both users and search engines understand the content of a webpage. Good URL structure is important for SEO (Search Engine Optimization) because it can improve a website's visibility in search results. Descriptive URLs that include relevant keywords make it easier for users to know what to expect when they click a link, enhancing the overall user experience.