Schema markup is structured data based on vocabularies such as schema.org, commonly embedded as JSON-LD. It can make entities and relationships explicit to systems that consume it, but there is no special schema that guarantees inclusion or citation in AI-generated answers.
In plain terms
Organization markup can state a company's canonical name, URL, logo, and sameAs profiles; Article, Product, and other types describe page-specific content.
Structured data must match the visible page. Markup that contradicts or invents content is not a substitute for clear, accurate HTML.
Google states that no special schema.org markup is required for AI Overviews or AI Mode. Structured data should be used for valid semantics and supported search features, not sold as an AI-citation switch.
Why it matters
Accurate structured data can make explicit facts easier for compatible systems to validate against the visible page.
Its value is semantic clarity and supported search features, not a guaranteed increase in AI mentions or citations.