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Canonical Links Fight Duplicate Content Issues

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Canonical Links Fight Duplicate Content Issues

Postby GoMage » Thu Jul 10, 2014 9:29 am

A canonical link is an HTML element that helps to prevent duplicate content issues by indicating the canonical or so called “desirable” version of a web page as the part of search engine optimization.
Duplicate content is a serious issue. It is a term that is used in order to describe the content which appears on more than one web page. It is used in the field of a search engine optimization. When the multiple web pages contain the same content, Google or other search engines can penalise or cease showing this site in any relevant search results.
When the site contains the multiple sub domains such as with or without “www”, the duplicate content issues can arise too.
Malicious duplicate content is a tool which is used for making some pressure on, manipulating search results and gain more traffic. It is called as search spam.
In February Google, Yahoo and Microsoft declared the support for the canonical link element which can be inserted into the <head> section of the web page in order to allow avoiding the duplicate content issue.

Please examine the examples of the canonical link element carefully:

<link rel="canonical" href="http://example.com/" />
<link rel="canonical" href="http://example.com/page.html" />

Of course, it will take you much time to create canonical link elements manually, but you can use the special third party extensions to make it easier and automatically. For example, if you are a Magento user and you have a Magento site.

One of the fresh Magento extensions that is being developed at the moment is GoMage SEO Booster. One of the useful features of this significant Magento extension is that the plug-in adds Canonical URL Meta Header to your pages. It saves your site from being penalized by the search engines such as Google, Yandex, Yahoo and so on.

If you are interested and desire to read more about this extension, go to GoMage SEO Booster landing page and get the necessary information:
https://www.gomage.com/gomage-seo-booster/
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Re: Canonical Links Fight Duplicate Content Issues

Postby ollymine » Tue Dec 23, 2014 12:44 pm

Duplication is a real pain for Magento (and many other CMS as well).
There are extensions that help organize categories and products properly. For example, Unique Product URL helps create a canonical product page address with only 1 category path. This way each product can be found in many categories but still have only one URL.

You can find useful info about ways to find and fight duplicate content in online stores here - blog.amasty.com/an-extensive-guide-on-magento-duplicate-content/
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Re: Canonical Links Fight Duplicate Content Issues

Postby MadGuy » Wed May 06, 2015 8:11 pm

@Amasty, how do you deal with increased number of rewrites and redirects using this extension? It can affect the performance, right?
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Re: Canonical Links Fight Duplicate Content Issues

Postby brucekenway » Wed Oct 21, 2015 2:56 am

Great information! Regarding removing the category from the URL on an existing site, I assume one will need to build a table of the inbound links and redirect them to the desired landing page? Is it better to handle it this way in Magento rather than doing a NOINDEX in the category landing pages?
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