> ## 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.

# Site Authority

> Site authority is the aggregate measure of a website's credibility and trustworthiness as assessed by search engines and AI systems — built from inbound link...

*Core concept* · *Citation & Visibility Measurement*

## Definition

Site authority is the aggregate measure of a website's credibility and trustworthiness as assessed by search engines and AI systems — built from inbound links, brand mentions, content quality, entity verification, and third-party citation patterns.

## Why It Matters for AI Search

Site authority is not a single metric — it is a composite of signals. High site authority means AI systems are more likely to retrieve content from the domain, more likely to trust it as a citation source, and more likely to use it when constructing answers. Authority is earned incrementally through consistent quality, wide citation, and verified entity presence — not through any single tactic.

## Related Terms

<CardGroup cols={2}>
  <Card title="Domain Authority" href="/ai-search-glossary/domain-authority" />

  <Card title="E-E-A-T" href="/ai-search-glossary/e-e-a-t" />

  <Card title="Source credibility" href="/ai-search-glossary/source-credibility" />

  <Card title="Backlink" href="/ai-search-glossary/backlink" />

  <Card title="Brand footprint" href="/ai-search-glossary/brand-footprint" />
</CardGroup>

## Relevant Plate Lunch Collective Services

[AI SEO](https://www.platelunchcollective.com/services/ai-seo)  [AI Search Visibility Assessment](https://www.platelunchcollective.com/services/context-map)