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Core concept · Entity & Knowledge Graph

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Definition

Co-citation occurs when two entities or sources are mentioned together across multiple independent documents, establishing an implied relationship between them. AI systems use co-citation patterns as evidence of topical association and mutual authority. Co-citation is how AI systems build their map of who is associated with what. A brand consistently mentioned alongside recognized industry authorities — in articles, roundups, and comparisons — accumulates topical association that is difficult to manufacture directly. It is also how AI systems learn what a brand does: being co-cited with “AI SEO” and “entity optimization” repeatedly across independent sources builds the system’s confidence that those are genuinely what the brand is about.

Entity salience

Brand mention

Unlinked brand mention

Citation signal

Topical authority

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Relevant PLC Services

Entity SEO Citation-Ready Content Context Map