Glossary
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55 sec read
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First published on:
August 5, 2026
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Reviewed by
Vlad Cîrneală
on
August 9, 2026

Schema Markup

Schema markup is structured code added to a webpage that explicitly tells search engines and AI systems what the content means, not just what it says.
Detailed Explanation

Built on the shared vocabulary at schema.org, schema markup labels entities like organizations, people, products, questions, and definitions in a machine-readable format, removing ambiguity that a crawler would otherwise have to infer.

It is worth being clear about what schema does not do: it is not a ranking boost, and adding it will not lift a weak page. What it does is remove guesswork. For AEO specifically, a handful of types carry most of the value — Organization for identity, FAQPage for question content, and DefinedTerm for definitions. The rest is optional.

Why It Matters

Schema markup is one of the clearest ways to help AI systems correctly extract facts and definitions from your content, directly supporting citation accuracy.

Example

A recipe page uses schema markup to explicitly tag the prep time, ingredients, and rating, so search engines can display that information directly in results rather than guessing from the page text.

Synonims
structured data