Duplicate content and its solutions


Duplicate content is something that very few websites get rid of, most of the time it is not even intended, created by our content manager. There are other types of duplicate content that are intended and can negatively affect the web.

What you need to know about duplicate content, in a very short way, is that it occurs when the same content appears in multiple URLs and that in principle is not a reason for the penalty, unless a high percentage of your website has duplicate content. Having a few duplicate pages will not make Google angry with us, but avoiding it will give you clues that we are on the right track.

Although it does not imply a penalty, it can generate a loss of positioning potential because the search engines do not know which are the most relevant pages for a particular search. Next, I will try some examples of duplicate content and how to solve them:

Ā«CanonicalizationĀ» of the page

This is the most common reason for duplicate content, it occurs when your homepage has more than one URL:

  • example.com
  • www.example.com
  • example.com/index.html
  • www.example.com/index.html

Each of the above directs to the same page with the same content, having them without any redirection makes the search engine not know which one you want to direct people to.


You have two options:

  • Redirect to the server to make sure there is only one page that is shown to users.
  • Define which subdomain you want to be the main one (“www” or “no-www”) in Google Webmaster Tools.

Tags and categories

This happens in blogs when many pages of labels or categories have the same content as other pages (something very, very common in the world of blogs). For example, we have a blog with 3 posts that has the following tags and categories:

*Title: How to solve duplicate content
– Tags: Duplicate content, SEO, tips
-Categories: SEO, tips, content
*Title: How to detect duplicate content
– Tags: duplicate content, SEO, content
– Categories: SEO, content
*Title: Tips for creating quality content
– Tags: tips, content, quality content
– Categories: SEO, content, tips


The solution depends on how you use the categories and tags and how many are in each post. If you use few categories and many tags (like most people) add noindex meta tags, follow your tag pages, in this case, your categories are the ones that will position in the search results. If you use many categories and a few tags, the thing would be reversed by adding the noindex meta tags, follow to your category pages.

Use of meta tags to block access to your site

Mobile version

This is increasingly happening due to the huge increase in mobile traffic in the last year. What happens here is that there are two URLs for the page on each and every page of a website.

  • www.example.com/page.html
  • m.example.com/page.html


There are a few possible solutions, the first is to make the mobile web different from the normal one, with all the pages with different URLs and different designs that present the information according to the device with which the web is accessed.

The latter requires a lot of time and effort, it is advisable to create a responsive design that dynamically adapts the web design based on the resolution of the visitor’s screen.

Finally, the fastest solution is to add rel = canonical tags to all web pages for mobile to the normal web.

URL parameters

There are many types of parameters, especially in e-commerce: product filters (color, size, score, etc.), sorting (lower price, relevance, higher price, grid, etc.) and user sessions. The problem is that many of these parameters do not change the content of the page, which produces many URLs for the same content.


The solution for any problem with the parameters is to add a rel = canonical tag to the original page, simply with this, you can avoid any confusion on the part of Google with the original page.

Another possible solution is to tell Google through Google Webmaster Tools> Settings> URL parameters which parameters you should ignore when indexing pages on your website.


Pagination refers to when an article, list of products or pages of labels and categories have more than one page. Although the pages have different content, they are all focused on the same topic. This is a huge problem in the e-commerce pages where they have hundreds of articles in the same category.S

How to use the NEXT and PREV parameters?

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