What is Vector Index Presence Rate?

Vector Index Presence Rate estimates how consistently your content appears in the retrieval layer of AI systems that use vector search. In practical terms, it asks whether your pages are semantically available when an AI assistant searches for answers related to your category, product, or buyer prompts. A low presence rate can mean content is unclear, too generic, not crawlable, poorly chunked, or missing the language buyers use. Improving this metric requires entity-rich pages, strong topic coverage, descriptive headings, concise answer blocks, and content that maps to distinct search intents. It is especially important for GEO because retrieval often happens before citation or recommendation.