Structured Data
Also known as: schema markup, JSON-LD, schema.org markup, semantic markup
Machine-readable markup added to web pages that explicitly declares the type, properties, and relationships of the content.
Structured data is a standardized format for providing explicit information about a page's content to machines. In the context of web publishing, structured data typically means schema.org vocabulary delivered as JSON-LD markup. It tells search engines and AI systems what type of content a page contains (Article, Product, Organization, FAQPage, etc.) and declares specific properties like the author, date, topic, and related entities. Structured data reduces the ambiguity that AI systems must resolve through inference alone.