> ## Documentation Index
> Fetch the complete documentation index at: https://wiki.platelunchcollective.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Source Credibility

> Source credibility is the degree to which an AI system or search engine trusts a source enough to cite it.

*Core concept* · *Content Strategy*

## Definition

Source credibility is the degree to which an AI system or search engine trusts a source enough to cite it. It is built from a combination of signals: domain authority, author credentials, citation history, structured data, third-party references, and consistency of accurate information over time.

## Why It Matters for AI Search

AI systems do not cite sources neutrally — they have implicit hierarchies of trust built from their training data and retrieval logic. A source that has been frequently cited by other authoritative sources, that has structured data confirming its entity identity, and that has a history of accurate information ranks higher in that hierarchy than a source that is new, unverified, or inconsistently referenced. Source credibility is earned over time and cannot be shortcut.

## Related Terms

<CardGroup cols={2}>
  <Card title="E-E-A-T" href="/ai-search-glossary/e-e-a-t" />

  <Card title="Author authority" href="/ai-search-glossary/author-authority" />

  <Card title="Trust signal" href="/ai-search-glossary/trust-signal" />

  <Card title="Authoritativeness signal" href="/ai-search-glossary/authoritativeness-signal" />

  <Card title="Citation signal" href="/ai-search-glossary/citation-signal" />
</CardGroup>

## Relevant Plate Lunch Collective Services

[Citation-Ready Content](https://www.platelunchcollective.com/services/citation-ready-content)  [Entity SEO](https://www.platelunchcollective.com/services/entity-seo)  [AI SEO](https://www.platelunchcollective.com/services/ai-seo)