Schema Markup — definition
Schema Markup is standardized code (typically written in JSON-LD format) added to a website to help search engines and AI bots understand page content and entity relationships.
Expanded Explanation
Maintained by Schema.org, schema markup translates unstructured human web copy into explicit, machine-readable key-value pairs representing FAQs, products, organizations, and articles.
Analogy & Mental Model
Schema markup is like attaching a nutrition facts label to a food item so consumers and inspectors know exact ingredients instantly.
Why It Matters & Where It's Used
Schema markup provides structured ground truth data that RAG scrapers and Google AI Overviews extract directly to populate search features and citations.
Concrete Real-World Application
Embedding JSON-LD FAQPage markup on a pricing page so Google displays expandable Q&A accordions directly in search results.
Schema Markup vs HTML Tags
HTML tags format text layout for human browsers, whereas Schema Markup formats data semantics for automated machine crawlers.
How It Works & Key Components
Injected into page HTML headers as JSON-LD script blocks.
1Entity Definition
Declaring the primary `@type` (e.g., Organization, DefinedTerm, Article).
2Attribute Value Assignment
Mapping specific properties like `name`, `description`, `url`, `sameAs`, and `author`.
3Machine Validation
Testing markup using Schema Validator and Google Rich Results Test tools.
Frequently Asked Questions
Q:Which schema types are most important for AEO?
Organization, Product, DefinedTerm, FAQPage, Article, and Person schemas carry the highest weight for AI search parsing.
Get cited across ChatGPT, Perplexity & Gemini with citedby
Optimize your brand’s AI visibility score, track Share of Model across buyer prompts, and turn zero-click search into your highest-converting pipeline source.
Explore citedby Platform