Schema.org
What is Schema.org?
Schema.org is the shared vocabulary used to describe a website's content so machines can understand it. It's maintained jointly by the major search engines and defines hundreds of types: Organization, Product, LocalBusiness, Article, FAQPage, DefinedTerm, and many more, each with its own properties. It isn't a format, it's the list of words; the format most commonly used to write it is JSON-LD. Using the types that actually fit the page is worth more than piling on markup for its own sake.
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