Google’s Best practices for using rel=canonical

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Including a rel=canonical link in your webpage is a strong hint to search engines your preferred version to index among duplicate pages on the web. It’s supported by several search engines, including Yahoo!, Bing, and Google. The rel=canonical link consolidates indexing properties from the duplicates, like their inbound links, as well as specifies which URL you’d like displayed in search results. However, rel=canonical can be a bit tricky because it’s not very obvious when there’s a misconfiguration.Common Mistakes With rel=canonical [googlewebmastercentral.blogspot.co.uk]

Google recommends the following best practices for using rel=canonical:

  • A large portion of the duplicate page’s content should be present on the canonical version.
  • One test is to imagine you don’t understand the language of the content—if you placed the duplicate side-by-side with the canonical, does a very large percentage of the words of the duplicate page appear on the canonical page? If you need to speak the language to understand that the pages are similar; for example, if they’re only topically similar but not extremely close in exact words, the canonical designation might be disregarded by search engines.
  • Double-check that your rel=canonical target exists (it’s not an error or “soft 404”)
  • Verify the rel=canonical target doesn’t contain a noindex robots meta tag
  • Make sure you’d prefer the rel=canonical URL to be displayed in search results (rather than the duplicate URL)
  • Include the rel=canonical link in either theof the page or the HTTP header Specify no more than one rel=canonical for a page. When more than one is specified, all rel=canonicals will be ignored.

Further Google reco on rel=canonical vs 301 re-direct

Over to you…

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Omar Kattan is Chief Strategy Officer at Sandstorm Digital, the MENA region's first specialist content marketing agency headquartered in Dubai. His experience includes 10 years in traditional marketing and advertising in the Middle East and a further 10 years at two of the largest media agencies in the UK. Follow Omar on Twitter for updates on the latest in digital, branding, advertising and marketing.

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