---
title: "Schema Markup — monitoring glossary"
description: "Schema markup is structured data added to a webpage in JSON-LD format that describes the page's content in machine-readable terms. It powers rich results in…"
canonical: "https://lemwatch.com/glossary/schema-markup"
source: "https://lemwatch.com"
---

# Schema Markup

> Schema markup is structured data added to a webpage in JSON-LD format that describes the page's content in machine-readable terms. It powers rich results in search, AI overviews, and LLM citation graphs.

**Also known as:** Structured data, JSON-LD

## Definition

 Schema.org is the shared vocabulary maintained jointly by Google, Microsoft, Yahoo, and Yandex. Common types include `Article`, `Product`, `FAQPage`, `Organization`, `BreadcrumbList`, `Person`, `Event`, and `Recipe`. Each emits its own rich result style in Google.

 In the LLM era, schema markup also drives citation: Perplexity, ChatGPT, and Google's AI Overviews all preferentially quote pages with structured data because it lets them attribute claims confidently.

## Why it matters

 FAQ schema alone can double click-through rate by adding expandable answer cards directly in search results. Article schema enables Top Stories carousels. Organization schema with sameAs links is the cheapest entity-recognition signal for LLM ranking.

 See it in the product: [SEO monitoring](https://lemwatch.com/features).


## Related

- [Monitoring glossary](https://lemwatch.com/glossary)
- [SEO](https://lemwatch.com/glossary/seo)
- [Canonical Tag](https://lemwatch.com/glossary/canonical)
- [Indexing](https://lemwatch.com/glossary/indexing)
- [SSL/TLS](https://lemwatch.com/glossary/ssl)
- [CSP](https://lemwatch.com/glossary/csp)
- [All monitoring checks](https://lemwatch.com/features)
- [Security Headers](https://lemwatch.com/glossary/security-headers)