> ## 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.

# Canonicalization

> Canonicalization is the process of specifying the preferred URL version of a page using a canonical tag — preventing duplicate content issues and consolidati...

*Technical implementation* · *Technical SEO*

## Definition

Canonicalization is the process of specifying the preferred URL version of a page using a canonical tag — preventing duplicate content issues and consolidating authority signals to the correct URL. It ensures AI crawlers and search engines index the definitive version of a page.

## Why It Matters for AI Search

Duplicate content fragments [entity signals](https://www.platelunchcollective.com/services/entity-seo). A brand with the same content accessible at multiple URLs — with and without www, HTTP vs HTTPS, trailing slash variants — splits its citation authority across multiple URL versions rather than consolidating it. Canonical tags direct AI crawlers to the preferred version, ensuring entity signals and citation authority accumulate on a single URL.

## Related Terms

<CardGroup cols={2}>
  <Card title="Indexability" href="/ai-search-glossary/indexability" />

  <Card title="Technical SEO" href="/ai-search-glossary/technical-seo" />

  <Card title="URL structure" href="/ai-search-glossary/url-structure" />

  <Card title="AI Crawler" href="/ai-search-glossary/ai-crawler" />

  <Card title="AI-first indexing" href="/ai-search-glossary/ai-first-indexing" />
</CardGroup>

## Relevant Plate Lunch Collective Services

[AI SEO](https://www.platelunchcollective.com/services/ai-seo)