> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getcited.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Schema Markup

> Structured data embedded in web pages that helps search engines and LLMs understand content type and meaning.

**Schema markup** is structured data (typically [JSON-LD](/glossary/structured-data)) embedded in web pages that tells search engines and LLMs what type of content the page contains — is it a product, an article, a FAQ, a how-to guide, or a definition? Schema markup uses the Schema.org vocabulary, a shared standard maintained by Google, Microsoft, Yahoo, and Yandex.

## Why it matters

Schema markup helps AI platforms parse content more accurately when selecting sources to cite. A product page with Product schema is easier for an LLM to interpret and cite than a page with the same content but no structured data. For [AEO/GEO](/glossary/geo), schema markup is a technical prerequisite — not a guarantee of visibility, but a signal that improves your content's AI-readability.

## How Cited uses it

Cited recommends schema markup as part of technical AI readiness. The GEO Score scanner checks for schema.org presence as one of its signal factors — see the [JSON-LD Structured Data signal](/signals/json-ld-structured-data) for what is measured and how to fix gaps.

## Related concepts

* [Structured data](/glossary/structured-data) — the broader category that includes schema markup
* [E-E-A-T](/glossary/e-e-a-t) — the quality framework that schema supports