STRUCTURED DATA · SEO GLOSSARY
Structured Data Coverage
Structured data coverage refers to the percentage of eligible pages on a site that have correctly implemented structured data markup — JSON-LD, Microdata, or RDFa — appropriate for their content type. High coverage means most product pages have Product schema, most articles have Article schema, and FAQ sections have FAQPage schema.
Definition
Structured data coverage is assessed at two levels: **Page-level coverage**: does the individual page have structured data appropriate for its content? An article page without Article JSON-LD has zero coverage; the same page with complete, valid Article JSON-LD (headline, datePublished, author, image) has full coverage. **Site-level coverage**: across all pages of a specific type, what fraction have correctly implemented structured data? An e-commerce site where 60% of product pages have valid Product schema and 40% are missing it has incomplete site-level coverage. Low site-level coverage often results from: structured data added to a page template that only applies to newer content (older content has no schema), schema added via GTM that fires inconsistently (JavaScript errors, partial page loads, cookie consent blocks), migration from one CMS where schema was configured to another where it wasn\'t, or manual per-page schema entry that scales poorly. **Validation dimension**: coverage is meaningful only when the structured data is valid. A site where 100% of pages have Product schema but 80% of those have missing required properties (image is the most common omission) has superficial coverage — the schema exists but doesn\'t qualify for Rich Results. **Priority order for coverage**: the highest-impact structured data to cover first: (1) FAQPage on pages with FAQ sections (directly enables rich result accordion in SERPs), (2) Product/Review on product pages (product rich results), (3) Article on editorial content, (4) LocalBusiness on local business sites, (5) BreadcrumbList for breadcrumb-enabled SERP display, (6) HowTo for instructional content.
Why it matters for SEO
Incomplete structured data coverage means Rich Results eligibility gaps — pages that could show FAQ accordions, star ratings, or HowTo steps in SERPs don\'t, resulting in smaller SERP listing footprint and lower CTR. For AI visibility, coverage of FAQPage and HowTo schema across eligible pages improves the overall GEO score, since these schema types signal to AI systems which passages are authoritative question-answer pairs. Consistent coverage across a content type (all product pages, all articles) is preferable to isolated coverage, because Google\'s Rich Results algorithms assess templates, not just individual pages.
How DeepSEOAnalysis checks this
The audit validates all structured data found on the crawled page: each schema type present, required and recommended property completeness, value format correctness, and server-rendering status (is the schema in the initial HTML response or only in the client-rendered DOM?). Coverage findings appear as: "Article JSON-LD found, missing required image property" or "FAQPage JSON-LD server-rendered and valid." Multi-page coverage requires a full site crawl (available on paid plans).
Useful tools and resources
GLOSSARY
Related terms
structured data
Structured Data
Machine-readable annotations added to HTML — usually JSON-LD — that explicitly describe what a page is about to search engines and AI systems.
Read definition →structured data
JSON-LD
JavaScript Object Notation for Linked Data — Google\'s preferred format for adding structured data (Schema.org markup) to web pages via a `<script type="application/ld+json">` block in the HTML head or body, keeping machine-readable data separate from visible content and easier to maintain than Microdata or RDFa.
Read definition →structured data
Rich Results
Enhanced search result formats that Google displays beyond the standard blue link, title, and description — including star ratings, FAQ dropdowns, product panels, recipe cards, How To steps, event dates, and job listings — enabled by valid structured data (JSON-LD schema) in the page\'s server-rendered HTML.
Read definition →structured data
FAQPage Schema
JSON-LD structured data that marks Q&A pairs on a page so search engines and AI systems can display and cite them directly.
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Product Schema
Product schema is a Schema.org structured data type that describes a product for sale — name, description, image, price, availability, reviews — enabling rich results including price, availability, and star ratings directly in Google Search results. It is the highest-priority structured data type for e-commerce.
Read definition →See how your site scores on Structured Data Coverage.
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