SEO Basics: Canonical Tag & Duplicate Content

At the latest update it with the panda has been etched with most webmasters: unique content that the web site differs from other providers is more important and central. No one wants to because of duplicate content (ie content that can be found in several places on the Web in the same way) will be penalized in the rankings. With verification methods such as Copyscape to be duplicate content and trace copies to third-party sites. But what many do not know: often produces its own web site unintentionally duplicated web content. How this comes about and what are the canonical tag can do about it, here at a glance.

Duplicate Content : The problem

Suppose you offer your users a friendly service and we also provide Web content for printing. For certain documents, lists, or lists the user can view before printing a print view. He sees how the document comes from the printer and how many pages it contains. Depending on the technical implementation of this print view, but sees not only the users the same content again. Also, the search engine crawler looks suddenly doubled. Duplicate content on same site - it is already in the world. And there are many other "mistake" by the double content is created.

Two of the most common variants are mentioned. Even if your website at the address http:// both www.domainname.com as well as at the URL http://domainname.com is to find all content are twofold. The same shall apply if site accessed via an http and an https connection. A list of many other kinds of duplicate content "producers" can be found here: information on Canonical Tags - Answers to Questions ! There is also described how the problem can be counteracted by relatively simple means of Canonical day.

Canonical Tag : The Solution

Because the major search engine providers from day one day have to deal with millions of duplicate content, they have considered in the spring of 2009, a countermeasure. Both Google and Yahoo! Search in the cases referred to plead for the use of a single HTML tag. This so-called Canonical tag identifies content that (for whatever reason) are duplicated and refers to that URL, which is regarded as the original. If the search engine crawler finds this characterization, so he knows full well that there is a duplicated content and can be specified for indexing prefer original page.

How the Canonical days

The canonical tag is set in the header of a URL and has the following form:

<link rel="canonical" href="http://mysite.com"/>


In the first half is thus marked as the Canonical tag and the second part of the web address under which the original can be found. The use is also recommended by the way, if the sides are not identical to one hundred percent, but have a high similarity.

And what the user webmaster from this? The first advantage is already simply that the risk of Ranking punishment is avoided. The search engine crawlers are usually kept in the Canonical tag instructions and make the desired prioritization. This is also already has a second advantage: the page content provider can those who are to be found as well pretend to own. He gives the crawlers were, a recommendation on the way: Do not take this, but the one web site to place too high up in the search results.

Resource on Article : SEO Basics: Canonical Tag & Duplicate Content

For more information about the canonical tag can be found also in the Google blog, for example here:

Determines your canonical Url
(http://googlewebmastercentral.blogspot.in/2009/02/specify-your-canonical.html)

Matt Cutts: SEO advice: url canonicalization
http://www.mattcutts.com/blog/seo-advice-url-canonicalization/

Also in the Webmaster Center Blog of Bing
(http://www.bing.com/community/site_blogs/b/webmaster/archive/2009/02/12/partnering-to-help-solve-duplicate-content-issues.aspx)

What is duplicate content?

 In the field of search engine optimization makes for many years, always a round of the term that triggers among the optimizers fear and insecurity. We are talking about so-called duplicate content. But what is this all about? This question let's get to the bottom.

The fact is that the search engines and especially market leader Google special importance on the fact of finding unique content on each Web page. By implication, this means that search engines see it at all happy when text content appears twice on one side or on different sites on the Internet.

The rationale for this approach are clear. The seeker will certainly not be pleased if he gets on a specific topic proposed five different sites from the search engine, which all have the same text content. For this reason, the search engines try to detect duplicate content on the Internet and filter out accordingly, for example, the fact that the relevant Web pages from the index of banned or at least be a whole lot further back.

Professional search engine optimization (SEO)for business websites.

For webmasters, it obviously means the meltdown, if they - consciously or unconsciously - produce such duplicate text content (duplicate content). It is therefore important to know, such as duplicate content created and how they can avoid the run-up already.

We assume that you have written the text content of your website itself and not copied from another website. If so, you should delete the relevant text content quickly, otherwise sensitive threaten legal action (warning letters, lawsuits, etc.). On the other hand, you also need to investigate your part, if another webmaster has copied text content of your page. You simply copy any passage out of your text and give them up with quotes in the search. There is nothing you can at least assume that nobody is using copied texts from your site in search engine index.

Next step: Check if the domain of your site at various locations on the Internet is accessible. It might look as follows:

http://yoursite.com

http://www.yoursite.com

http://www-iyoursite.com/index.html

If this is the case, there is a risk of producing side internally duplicate content. The workaround is to set up a permanent redirect using the htaccess file. You put on your web server to a text file named " htaccess. and fill them with the following content ":

(RewriteEngine On

RewriteCond %{HTTP_HOST}

redirect 301 / http://yoursite.com/)

A problem could also arise from dynamic URLs. This is particularly the case if your website is written in PHP and "speaking" the URL's of the cryptic notation to convert PHP. If so, you ensure that old or unneeded sites are immediately removed from the server, and finally only the new URL's are available.

Next point problem: Have you moved recently to a new domain with your web server? Then duplicate content could also arise by the old server automatically linked with the corresponding IP address to the new. Solve the problem by deleting the old server or switch off completely.

If you follow these tips and tricks that might double the risk of producing content to be vanishingly small. They create the best possible conditions, that your website is positioned as closely as possible in the search results.