# What is Schema.org? Schema.org / Structured Data, explained

> Machine-readable meaning for every page.

Schema.org is the shared vocabulary search and answer engines use to read structured data from web pages. Marking up an article with BlogPosting, FAQPage, BreadcrumbList, and DefinedTerm tells engines what each block means — which is what makes featured snippets, AI Overviews, and rich results possible.

## How Schema.org differs from AEO, SEO, Featured Snippet

Semantic HTML (article, section, dl) tells the browser what something is structurally. Schema.org goes further — it tells engines what something means as an entity (Article, Person, Product, Recipe, FAQPage).

## How Mentionwell handles Schema.org

- Every article ships BlogPosting + FAQPage + BreadcrumbList JSON-LD by default.
- Glossary spokes ship DefinedTerm + DefinedTermSet so the entire vocabulary is discoverable as a structured set.
- Citation @id chains link Article schema to every cited source.

## Frequently asked questions about Schema.org

### What is Schema.org?

A shared vocabulary, maintained by Google, Microsoft, Yahoo, and Yandex, for marking up structured data on web pages so search and answer engines can read meaning, not just text.

### Which schemas matter most for AEO and GEO?

BlogPosting (or Article), FAQPage, BreadcrumbList, and DefinedTerm. HowTo, QAPage, and Speakable apply when the outline calls for them.

### Does schema markup still matter in 2026?

Yes. AI Overviews, featured snippets, and Perplexity all read structured data. Schema doesn't guarantee a rich result, but missing schema rules a page out.

## See also

- [AEO — Answer Engine Optimization](https://mentionwell.com/aeo): Be the answer.
- [SEO — Search Engine Optimization](https://mentionwell.com/seo): The original — still 50%+ of traffic.
- [Featured Snippet — Featured Snippet](https://mentionwell.com/featured-snippet): Position zero — the answer above the links.

## Sources

- [Schema.org](https://schema.org/) — Schema.org consortium · Canonical vocabulary.

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Canonical URL: https://mentionwell.com/schema-org
Live HTML version: https://mentionwell.com/schema-org
Site index for AI ingestion: https://mentionwell.com/llms.txt
Full reference: https://mentionwell.com/llms-full.txt