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Home > Marketing Glossary > Canonical URLs (canonicalization)

Online Marketing Glossary

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Canonical URLs (canonicalization)

On some webservers there are more than one URL for a resource. Usually there are canonical URLs (which should be actually used and distributed) and those which are just shortcuts, internal ones, etc. Independent of which URL the user supplied with the request he should finally see the canonical one only. Canonicalization is used to ensure that data conforms to set rules and is in an approved format.

Examples of canonical URLs include:

  • www.yoursite.com
  • yoursite.com
  • ww1yoursite.com
  • www.yoursite.com/index.html
  • www.yoursite.com/default etc

From an SEO point of view, to avoid confusion for your site visitors and search engine crawlers, it is always best to avoid having multiple versions of your sites.