Any SEOs ninjas here please? my site www.agicent.com, which was doing good for the keyword app development company (ranking between 1st to 3rd page on google since a month) suddenly pushed back to 11th page, and the traffic reduced drastically as well.<p>I thoroughly checked the site and figured no bad backlink, though I got major crawl errors and duplicate pages (my original pages were duplicated under the agicent.com/blog/ root folder as well FYI), so I fixed that and resubmitted the site map.<p>Can this be the reason of that sudden decline (although google says 404 errors don't harm rankings)?<p>Can anyone please help me analysing the issue, and possibly suggest a fix.<p>Thanks,