Chapter Glossary

Chapter Glossary

Schema Markup

A standardized vocabulary of tags added to a page's code that describes content in machine-readable terms, allowing search engines to understand what specific elements represent rather than inferring meaning from context.

Schema.org

The collaborative project maintained by Google, Microsoft, Yahoo, and Yandex that defines the shared vocabulary of structured data types and properties used across the web.

Structured Data

Information organized in a predictable, machine-readable format so that software systems can parse and use it reliably, as distinct from unstructured content like free-form prose.

Rich Result

A search result that displays additional visual elements beyond a title, URL, and description, such as star ratings, prices, images, or expandable questions, enabled by qualifying structured data on the page.

SERP Feature

Any element on a search results page that goes beyond a standard organic listing, including rich results, knowledge panels, carousels, and answer boxes, many of which are triggered or informed by structured data.

JSON-LD

JavaScript Object Notation for Linked Data, the structured data format Google recommends for schema markup, written as a script block in the page's HTML rather than embedded within visible content tags.

BlogPosting Schema

A schema type that explicitly identifies a page as a blog article and labels properties such as headline, author, and publication date so search engines do not have to infer them from page layout.

FAQ Schema

A schema type that marks up question-and-answer content so search engines can display expandable questions directly in the search result, now restricted to government and health sites under Google's current guidelines.

Product Schema

A schema type that communicates structured product information, including price, availability, and ratings, as explicit machine-readable facts rather than text embedded in page content.

Organization Schema

A schema type that describes a brand or organization, including its name, logo, contact information, and sameAs links to verified external profiles, supporting entity recognition and knowledge panel eligibility.

sameAs Property

A schema property that links an entity to its verified profiles on external platforms such as Wikipedia or social networks, helping search engines confirm that multiple sources describe the same real-world entity.

LocalBusiness Schema

A schema type that provides structured facts about a physical business location, including address, opening hours, and category, allowing search engines to display this information accurately without inferring it from page text.

AggregateRating Schema

A schema type that communicates a combined rating score and review count for an entity, enabling star ratings to appear in search results when the underlying data meets search engine quality standards.

Video Schema

A schema type that supplies details about a video, including duration, thumbnail URL, and description, that a crawler cannot reliably extract by scanning the video file itself.

Breadcrumb Schema

A schema type that communicates a page's position within a site's hierarchy, allowing search engines to display a readable breadcrumb trail in the result instead of a raw URL.

Event Schema

A schema type that describes time-sensitive content such as events or offers, including start and end dates, so search engines understand when the content is relevant and when it expires.

Entity

A distinct, identifiable thing in the real world, such as a person, organization, place, or product, that search engines recognize and connect across multiple sources rather than treating as isolated text on a page.

Knowledge Panel

A structured information box that appears in search results for recognized entities, drawing from verified sources including schema markup, Wikipedia, and other authoritative references.

Markup Validation

The process by which search engines check structured data against their quality requirements to determine whether a page qualifies for the rich result the markup was intended to enable.

Schema Deprecation

The process by which schema.org or individual search engines retire support for a structured data type or property that no longer meets current quality or relevance standards, causing previously functional markup to stop producing results.