Schema.org / JSON-LD
Standard vocabulary to describe entities (company, product, person) that search engines and LLMs understand.
Schema.org is a vocabulary shared by Google, Microsoft, Yahoo, and Yandex to mark up a page's content with types like Organization, Person, Service, Article, FAQPage, or BreadcrumbList. JSON-LD is the preferred insertion format (a JavaScript Object Notation block with a schema.org context). Implementing it well enables rich results in Google and, increasingly, improves LLM understanding when they decide which source to cite.