My site has been around for 15 months. My financial section was getting around 200 referrals per day from Google search engine since May this year. Two popular key phrases were "npv calculator" and "irr calculator" . Yesterday Nov 14, I noticed a smaller than usual page impressions, just to see if any thing was wrong I did google search on popular key phrases that use to show my site as 3rd or 4th on first page of google search results. But to my astonishment the search results did not show my site on first page. I checked with site: command to find my pages are still indexed. Site visits have dropped below 50% since. I never did SEO work for my pages for some reason after a couple of week of uploading new pages, they use to be higher in google search results. If any one here can comment on as to why this might have happened. By the way I checked in Google WebMasterTools , and there are no messages there from Google so I assume I have not done anything wrong. There is one thing I did last week in Google WebMasterTools. As my customer base is US, I associated US as locale for my site