Definition

Market coverage

Market coverage describes the set of country and language combinations in which an engine's answers can be reliably collected.

Anonymous SERP-based engines can be measured in essentially any market. Account-gated engines have narrower coverage, and regional restrictions apply in some regions.

Coverage claims should always be stated per engine per market, because 'we cover 40 countries' usually means one engine does.

Nostimates measures market coverage across twelve AI answer surfaces. Request access →

All terms

AEO (Answer Engine Optimisation)GEO (Generative Engine Optimisation)AI Overviews AI Mode Citation share n-sampling Query fan-out Grounding Share of voice (AI)Extraction success rate Surface Answer engine Citation Brand mention Mention rate Confidence interval Statistical significance Citation volatility Non-determinism Reproducibility Identity-free collection Personalisation Locale Residential proxy Bot detection Collection cost Credit Evidence retention Audit trail Parser version Canary prompt Data freshness Cadence Prompt set Head term Long-tail query Competitive set llms.txt robots.txt AI crawler Training crawler Retrieval-augmented generation (RAG)Hallucination Answer box Featured snippet Zero-click search Entity Entity salience Knowledge graph Structured data JSON-LD schema.org FAQ schema Answer-first content Chunk Embedding Semantic search Prompt injection Sentiment analysis Position tracking White-label data