If you are wonder if the traffic driven to your website matters in search engine position you should read this patent granted to yahoo. Go to http://patft.uspto.gov/netahtml/PTO/search-bool.html and search for this patent number: 7,398,271 Invented by Arkady Borkovsky, Douglas M. Cook, Jean-Marc Langlois, Tomi Poutanen, and Hongyuan Zha Assigned to Yahoo US Patent 7,398,271 Granted July 8, 2008 Filed April 16, 2002