Google's Duplicate Internet Content Filter In Action
Tony Simpson
If you don't believe Google's Duplicate Content Filter exists,
I have Dramatic Proof their Internet content filter exists and
it's very effective.
On July 5, 2005 I published an article entitled "7 Top Ways to
Avoid Link Theft" which was picked up and included as content
on other websites.
Before the article was released I checked on Google whether any
results already existed for the exact phrase "7 Top Ways to
Avoid Link Theft" and there were no listings for that term.
Over the next few weeks I monitored through a search query on
Google how many results appeared in Google for the title of my
article. One week after publication there were 6,760 results
listed in Google, a week later it was 14,100 and it reached a
peak of 17,000 results by July 26, 2005.
4 weeks after publication the results in Google had fallen
slightly to 16,600.
Almost 6 weeks after publication the results listed in Google
had fallen to 44.
In a matter of less than two weeks the number of search results
on Google.com for the title of my article had gone from 16,600
to just 44.
In case you're thinking this is because all these other
websites dropped by article and replaced it with other content
I should add that a search on Yahoo.com on the same day still
showed 14,300 results for my article.
What's more of these 44 results on Google, more than half
consist of listings from the same websites. In other words some
sites have the same article duplicated on different pages on
their website.
So Google's Internet Content Filter is not used to remove
duplicate listings from the preferred websites it chooses to
keep in the search results.
On August 28th, 2005 8 weeks after first publication I
distributed the article again to a new list of article sites to
repeat the process. After 6 weeks the same article had reached a
peak of 5,620 results on Google. Less than 2 weeks later the
results had fallen to 217.
For me this was dramatic proof that Google's Duplicate Internet
Content Filter is active and very effective. If you're wondering
if other major search engines have a duplicate content filter I
can confirm that Yahoo certainly does. The same article which
was once listed on 14,300 sites on Yahoo, has fallen to 344
over the same time period.
>From these results it would seem Google takes about 6 to 8
weeks to remove duplicate content using its Duplicate Internet
Content Filter.
But the question remaining is just how does Google decide which
out of over 16,000 results does it keep and which does it
reject?
I have witnessed situations where my own articles appear in
results on other websites, but are not listed in the results
for my own website.
So clearly Google does not take into account who the originator
and author of the original article was when deciding which sites
will remain in its search results.
It also seems to have nothing to do with where Google first
finds the article.
Some articles I have published to my website for several weeks
before releasing them for distribution to other websites.
In that time the Google spiders have visited my site several
times and Google has had enough time to work out that the
article was first found on my site.
It would be interesting to see if it's possible to work out
what factors Google is using in its Internet Content Filter to
decide which results to keep in its listing and which ones to
remove. But that's for another article.
About The Author: Tony Simpson is a Web Designer and Search
Engine Optimizer who brings a touch of reality to building a
Web Business. A related report on article distribution is at:
http://www.webpageaddons.com/stp/announcerclaim Article
Announcer Review - Testing Product Claims
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