Structured data is information that expresses the object and properties of a page in a defined vocabulary and format. On the web, the Schema.org vocabulary and JSON-LD are used to convey the meaning of objects such as articles, products, and organizations.
A rich snippet is a search result with details such as a product price or rating beyond the usual title and description. Google documentation uses the term rich result.
BreadcrumbList schema represents the hierarchy leading to a page within a site. It can describe the page's location alongside visible breadcrumb navigation.
WebSite schema uses Schema.org vocabulary to describe information such as a site’s name and URL. It can support Google’s site-name display but does not guarantee a particular presentation.
A knowledge panel is an information box in Google Search summarizing an entity such as a person, organization, or place. Google generates panels automatically from multiple sources.
A knowledge graph is a data structure that structures and expresses objects such as people, organizations, places, and concepts and their relationships.
An entity is something that search engines and AI can independently identify, such as a person, organization, place, product, or concept. It is the basis for search that is understood in terms of meaning and relationships rather than word matches, and plays a central role in knowledge graphs and AI answers.