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The Madison Avenue Field GuideA field guide to marketing & advertising, by Brandon Mina

GlossaryAI in MarketingVector Database

AI in Marketing

Vector Database

A database that stores embeddings and quickly finds the most similar ones, powering semantic search, recommendations, and RAG.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

A vector database is a database that stores embeddings, numerical representations of text, images, or other content, and quickly finds the most similar ones. It enables meaning-based retrieval rather than exact matching. Vector databases power semantic search, product recommendations, and retrieval-augmented generation in AI applications.