Enable this option to prevent search engines from following links to pages with the same content, but sorted differently. These pages might be tagged as "[URL="http://seoforums.org/seo-questions-answers/2479-duplicate-content-forum.html"]duplicate content[/URL]". Therefore, we recommend enabling this feature
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Hai.Hai[URL="http://seoforums.org/newthread.php?do=newthread&f=39"][/URL]