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Canonical Tags

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What are Canonical Tags?

A canonical tag is a piece of HTML you can place on your web page that will let search engines know which URL to use in the search results. This is mainly used when you have a page on your site that can be accessed by multiple instances of the same URL via the addition of querystring items to the URL e.g. the URL http://www.c2software.com/case-studies/c2-clients-crm-and-web.aspx could also be accessed via the following URLs:

http://www.c2software.com/case-studies/c2-clients-crm-and-web.aspx?ccategory=CRM

http://www.c2software.com/case-studies/c2-clients-crm-and-web.aspx?ccategory=WEB

The HTML should be placed between the <head> tags in the page and takes the following form:

<link rel="canonical" href="http://www.c2software.com/case-studies/c2-clients-crm-and-web.aspx" />


The Advantages of Canonical Tags

Placing the tag on your site pages will prevent issues with duplicate content being detected by the search engines as when this occurs, and a canonical tag is not placed on the page, the search engine will experience the following issues:

  • It doesn’t know which version of the page to rank for query results
  • It doesn’t know which version of the page to index

Having this duplicate content on your site will cause a dilution of your search rankings and a potential loss of traffic to the site so it is always wise to add the canonical tag to your web pages.


About the Author

James CTwo is our blogging alter ego for the Dynamics CRM and Web experts here at C2. We have a passion for anything CRM, Web Design or Social Media. We love writing about it! Find us on YouTube & Twitter.

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