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Why did google penalize most pdf search engines?

Discussion in 'Google' started by thepeach, May 31, 2010.

  1. #1
    I noticed google penalized a lot of pdf search engines (yesterday).

    These used to be in the top 20:
    pdf-search-engine.com
    pdfgeni.com
    pdfqueen.com
    pdfxp.com
    pdflost.com

    Now they are all gone. Does anybody have an idea why?
    SEMrush
     
    thepeach, May 31, 2010 IP
    SEMrush
  2. yustman

    yustman Peon

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    #2
    same here, today Google penalized most of my best keywords, can anyone explain? how can we fix this? thanks
     
    yustman, May 31, 2010 IP
  3. DoDo Me

    DoDo Me Peon

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    #3
    ok, seems google changes them basic arithmetic again, I can smell the next PR update is near
     
    DoDo Me, May 31, 2010 IP
  4. Justin_Dupre

    Justin_Dupre Peon

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    #4
    Good question. Let me know when you guys find out why they penalized these keywords.
     
    Justin_Dupre, May 31, 2010 IP
  5. WishBone

    WishBone Peon

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    #5
    Penalized where? On serp or they lost their PR? If majority of pdf sites are being in hit, Google's algo probably had something to do with it..
     
    WishBone, May 31, 2010 IP
  6. thepeach

    thepeach Active Member

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    #6
    Penalized on serp. All the sites still have their PR.

    I also think it has something to do with the algorithm. These sites had hugh traffic because they kept a log (index) of all their searches. The big G must have seen these inner pages as "low value" pages now and deleted them all. They even deleted the index page.

    Do you guys think they will reappear in the search engines? Or will this be a permanent ban?
     
    thepeach, Jun 1, 2010 IP
  7. yustman

    yustman Peon

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    #7
    not only on search engine position, most of them are literary missing from the search results.
    what freaks me out is that, 2 days ago I'm still at the first page for most keywords and #1 for some. but now its gone, as if like I have a brand new site.
    FYI (my site is 2 years old)
    right now, I have zero traffic from google.com but I still received some low quality keywords from other google domains such as google.it, google.hu etc.

    same questions as thepeach. is this a permanent ban? will they reappear if I change the structure of the site?
     
    yustman, Jun 1, 2010 IP
  8. S0NEL

    S0NEL Greenhorn

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    #8
    hmm,,, it seems that google has done some changes in their algorithm, otherwise some of these sites were much older and should not be penalized. Since, I am using these sites I have never noticed any blackhat technique used on it to promote it or to get better results.
     
    S0NEL, Jun 1, 2010 IP
  9. Dylan.K

    Dylan.K Peon

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    #9
    It seems docstoc.com (which publishes pdf documents) is not working as well as it did for me. Before, I would get 200-300 visitors a day to my pdf documents on the site. Now, less than 100.
     
    Dylan.K, Jun 1, 2010 IP
  10. DoDo Me

    DoDo Me Peon

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    #10
    If I search "pdf search engine" at Google, there still 10 results, if someone got penalized, there must be someone's success.
     
    DoDo Me, Jun 1, 2010 IP
  11. JamesColin

    JamesColin Prominent Member

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    #11
    I don't know why, I guess because there so many of them now. But several of mine have also been banned regularly in the past few months.
    It would be interesting to detect and analyse if some PDF search engines didn't get banned and what difference do they have compared to most others.
     
    JamesColin, Jun 4, 2010 IP
  12. Sxperm

    Sxperm Notable Member

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    #12
    I do not think this penalization, not sure if we should call it a penalty, are made because of some abused with PDF Spam. I have found many websites using the same PDF file as their contents, which is not a different from duplicate contents issue anyway. I have found many of websites that using a ton of PDF as a content bait, lure Googlebots coming to the town, are not the real owner of them. That was so lame and pretty bad effect toward search results quality in the end.
     
    Sxperm, Jun 4, 2010 IP
  13. axa

    axa Active Member

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    #13
    Yesterday, all of my pdf search sites (total 12) was penalized also. Black Friday for me.
     
    axa, Jun 5, 2010 IP
  14. simple007

    simple007 Well-Known Member

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    #14
    i guess its temporary fluctuation...
     
    simple007, Jun 5, 2010 IP
  15. me against the machine

    me against the machine Peon

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    #15
    Hello, I'm Nejib from France, the owner of pdf-search-engine.com. Google blacklist all of them, (I have an everege of 500 000 unique visitor per day..) only small websites are not blacklisted, I don't think that it's because of Duplicate Content, because my website was the first pdf search engine...but it's blacklisted too...

    GOOGLE CHANGE THEIR ALGORITHM... and it's Over for pdf search engine (doc search engine too), they play with us ! no matter, we should be more creative.. other ideas.
     
    me against the machine, Jun 8, 2010 IP
  16. julietevents

    julietevents Peon

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    #16
    i am also think its temporary fluctuation..
     
    julietevents, Jun 8, 2010 IP
  17. meditation

    meditation Peon

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    #17
    Google wont ban the websites if they promoting methods are legitimate.i think it is normal if they want to update their ranking and i hope they will back normal.
     
    meditation, Jun 8, 2010 IP
  18. JamesColin

    JamesColin Prominent Member

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    #18
    I don't believe it will come back to "normal". As Nejib said, we need to move on to other ideas.
    But you can still try pdf search engine if you believe it will come back, I don't think so, or not in this form anyway.
     
    JamesColin, Jun 9, 2010 IP
  19. China_girl

    China_girl Well-Known Member

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    #19
    PDF search engines ??

    You mean PDF results in their searches I guess...
     
    China_girl, Jun 9, 2010 IP
  20. coomme

    coomme Peon

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    #20
    they web sites are spammer
     
    coomme, Jun 15, 2010 IP