# Schema.org

**Source:** https://promtable.com/glossary/schema-org

> Schema.org is a shared vocabulary of structured-data types — Article, Product, Person, FAQPage, DefinedTerm — embedded as JSON-LD in HTML so search engines and AI answer engines can extract structured meaning from a page.

---
Schema.org is a shared vocabulary of structured-data types — Article, Product, Person, FAQPage, DefinedTerm — embedded as JSON-LD in HTML so search engines and AI answer engines can extract structured meaning from a page.

Schema.org launched in 2011 and by 2026 is the lingua franca for structured data on the web. Pages declare their types and properties via JSON-LD blocks in the HTML head. Search engines (Google, Bing) use schema for rich results and knowledge graph; AI answer engines use schema to extract entities and claims. The highest-leverage types in 2026: Article + speakable, FAQPage, DefinedTerm, ItemList, HowTo, Organization with founder + sameAs, BreadcrumbList. Validate with Google Rich Results Test and the Schema Markup Validator before shipping.

## When to use

- Every public-indexable page.
- Glossary, FAQ, list, comparison, and product pages especially.

## Common mistakes

- Stale dateModified — search engines down-rank dishonest freshness signals.
- Conflicting @id refs across schema entries — breaks entity graphs.

## Related terms

- [ai-search-engine](https://promtable.com/glossary/ai-search-engine)
- [rag](https://promtable.com/glossary/rag)

## Sources

- [Schema.org documentation](https://schema.org/)

*Last updated: 2026-06-01*
---

Original page: https://promtable.com/glossary/schema-org
Maintained by Promtable (https://promtable.com). Content: CC BY 4.0. Cite as "Promtable — https://promtable.com/glossary/schema-org".
Contact: info@vibecodingturkey.com.