| Take a look at your website. How much of
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| | Product-Only Pages
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| your content might be considered as
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| | Product pages looking similar are common
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| duplicate by a search engine algorithm?
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| | among online stores. Typically they are
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| Even though you never copy anyone you
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| | created using a single template. Often
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| can't answer 'none' because someone can
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| | two different product pages share a
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| be copying you. Duplicate content is one
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| | description that varies in just few words
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| of the biggest issues both for search
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| | or numbers, which causes them to be
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| engines trying to keep their results'
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| | filtered out as duplicate content. This
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| relevancy high, and webmasters trying to
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| | issue has no easy solution. Either you
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| avoid search engine penalties.
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| | rewrite robot.txt to allow only one
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| Penalties for having duplicate content
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| | product description to be crawled and
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| can be really harmful. This is not just a
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| | lose SE traffic to the rest of them, or
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| downgrade in rankings but a move to
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| | you roll up your sleeves and add
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| supplementary results which are hardly
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| | something different to each product page,
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| visible to the most of the web users.
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| | like testimonials, which is time
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| Normally it is expected that Google would
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| | consuming or nearly impossible depending
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| select one URL over another to display in
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| | on the number of product types in your
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| SERPs, while duplicates could be found in
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| | stock.
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| supplemental results. Unfortunately this
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| | How Do Duplicate Content Filters Work?
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| is not always so. In the thread
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| | There are several algorithms in data
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| "Duplicate content observation" in the
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| | mining aiming to detect similar text
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| forum you can read about a case when an
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| | passages. The one claimed to be used by
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| original high quality and authoritative
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| | search engines is w-shingling. Each
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| page was removed from Google's index
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| | document has a unique fingerprint or
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| together with its duplicates. Considering
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| | shinglings - the contiguous subsequences
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| that this can happen even to the most
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| | of tokens (blocks of text). The ratio of
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| honest webmaster, one can imagine the
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| | magnitude of union and intersection of
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| amount of attention this issue gets on
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| | two documents' shinglings can be used to
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| any SEO forum.
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| | determine their resemblance. Another
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| Types of Duplicate Content
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| | algorithm that can be used for duplicates
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| Duplicate content has a wider definition
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| | detection is Levenshtein's distance
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| than the 'copy-paste' plagiarism; it is
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| | It is naturally to expect from a
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| not just content scrapped from a
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| | duplicate content filter to be able to
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| competitor's site, a SERP or a RSS feed.
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| | discover the origin and rank it higher.
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| Apart from this there are few more
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| | The simplest way to detect the origin
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| aspects that are generally referred to as
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| | would be comparing the date of indexing
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| duplicate content.
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| | implying that the original source is
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| Circular Navigation
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| | uploaded and crawled earlier than its
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| Jake Baille from TrueLocal vaguely
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| | copies. But with the advent of the RSS
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| defines circular navigation as having
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| | feeds the new content can be distributed
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| multiple paths across website. This can
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| | instantaneously and this approach is no
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| be understood as the same content being
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| | longer valid.
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| accessible via different URLs. An example
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| | Concerning the origin's right to be
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| of the circular navigation could be an
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| | ranked higher - this is not always
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| article that is retrieved by links like
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| | implemented. J.S.Cassidy in her article
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| - example.com/articles/1/ ,
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| | 'Duplicate Content Penalties Problems
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| - mysite.com/article1/
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| | with Googles Filter' published at tells
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| - mysite.com/articles.php?id=1
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| | about an experiment of an article
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| Another legitimate use of multiple URLs
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| | distribution. An article was syndicated
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| is forum threads. Each thread can be
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| | twice scoring as many as 19000 copies.
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| accessible by a link like myforum.com
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| | After some time Google, Yahoo and MSN
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| index.php/topic.1201.html , and each
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| | have purged their indices leaving just
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| message within the tread has a URL like
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| | few of the duplicates. MSN's filter
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| myforum.com/index.php
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| | managed not only to discover the origin
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| topic.1201.msg.01.html . In the eyes of a
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| | but also put it to the top of the search
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| search engine all the links lead to
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| | results. Yahoo has also discovered the
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| different pages with identical content.
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| | origin, but in the results page to the
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| Solution? Think of a consistent way of
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| | title of the article, the origin's
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| linking, or apply robot.txt exclusion
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| | position fluctuated obviously responding
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| rules.
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| | to the way Yahoo counts relevancy and
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| This can also be the case when other
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| | authority.
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| people link to you using differently
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| | To the tester's amusement Google's
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| looking URLs. Since these external links
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| | refined index did not include the
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| are out of your control, you should
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| | original at all! Evidently Google
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| create a 301 redirect to the canonical
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| | featured only those pages with copies of
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| URL you choose to be displayed.
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| | the same article which it considered
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| Printer-Friendly Versions
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| | relevant and authoritative with no regard
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| Making a printer friendly version is a
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| | to the original source of the content!
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| common practice and it adds value to the
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| | I've already mentioned a thread where a
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| visitors. But printer-friendly version is
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| | similar problem is discussed. The both
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| also a prominent example of duplicate
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| | stories took place in 2005 and early 2006
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| content! Fortunately a simple solution
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| | and so far I found no evidence that this
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| like adding a 'noindex' meta tag to your
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| | issue is resolved.
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| print pages solves the issue.
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