Structured data is a standardized format for providing information about a page's content in a way that search engines can parse and understand. By adding structured data markup to HTML, website owners help search engines interpret the meaning of the content, which can result in enhanced search result displays known as rich results or rich snippets.
The most widely used vocabulary for structured data is Schema.org, a collaborative project maintained by Google, Microsoft, Yahoo, and Yandex. Schema.org defines hundreds of types and properties that describe everything from articles and products to events and recipes. The data is typically embedded in pages using JSON-LD format, which Google recommends as the preferred implementation method. Schema.org books on Amazon provide implementation guides.
For URL shortening services, structured data enhances the visibility of content pages like glossaries and articles. A glossary page might use the DefinedTerm type to describe each term, while article pages use the Article type. BreadcrumbList structured data helps search engines understand the site's navigation hierarchy.
Testing structured data is essential before deployment. Google's Rich Results Test and Schema Markup Validator help identify errors and preview how the data will appear in search results. SEO tools books on Amazon cover testing workflows.