Structured Data

Structured data is standardized code, usually schema.org vocabulary added in JSON-LD, that describes a page's content so search engines can understand it and display rich results such as reviews, FAQs, products, events, and breadcrumbs. Google recommends JSON-LD and maintains its own list of supported features, which it treats as definitive over schema.org for Search behavior. The supported set changes over time; for example, Google removed the practice-problem feature in January 2026.

Source: developers.google.com