Glossary
Schema.org
Definition
The shared vocabulary of types and properties (RealEstateAgent, Review, Service, Place) that Google, Bing, and AI systems all agree to read. It is the dictionary structured data is written in: a common language for stating facts machines can trust.
Schema.org exists because every search engine inventing its own markup would have doomed the idea. The major engines maintain it jointly, which is why one correctly marked page is legible to all of them, and increasingly to the assistants grounding their answers in the same web.
For an agent, the types that matter are RealEstateAgent, the review and rating types, and the place types that document a service area. We write them in JSON-LD on every page we build.