What it means
It is a fact card for search engines that states whether the page represents an article, product, organisation or another entity.
Term in plain language
Structured data
Machine-readable markup that explicitly describes page entities and their properties.
Why it matters
Correct markup reduces ambiguity and gives search engines data for richer result presentation.
Example
A product page supplies its name, price, availability and brand through Product markup.
Related pageRelated terms
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Redirect
An HTTP response that sends browsers and search crawlers from one URL to another.
Schema.org
A shared vocabulary of types and properties for machine-readable descriptions of web-page entities.
JSON-LD
A format for supplying linked structured data in a separate JSON block within an HTML document.