JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding structured data using JSON syntax, embedded in web pages via script tags. It is Google's recommended format for implementing structured data because it separates the data from the HTML markup, making it easier to implement and maintain.
JSON-LD is added to a page by placing a script tag with type="application/ld+json" in the HTML head or body. The JSON content describes the page using Schema.org vocabulary, specifying the type of content and its properties. For example, a glossary term page might include a DefinedTerm object with name, description, and inDefinedTermSet properties. JSON-LD books on Amazon provide implementation guides.
Compared to alternative formats like Microdata and RDFa, JSON-LD offers several advantages. It does not require modifying existing HTML elements, it can be dynamically generated by JavaScript frameworks, and it is easier to read and debug. These benefits have made JSON-LD the dominant format for structured data implementation.
For URL shortening services, JSON-LD is used to mark up content pages with appropriate Schema.org types: BreadcrumbList for navigation, CollectionPage for list pages, DefinedTerm for glossary entries, and Article for blog posts. Web development books on Amazon cover these patterns.