Online marketing firm Wodstream sifts through Google's (GOOG) search and keyword data to...

|By:, SA News Editor

Online marketing firm Wodstream sifts through Google's (GOOG) search and keyword data to determine its largest advertisers. It believes Lowe's (LOW) spent the most of any advertiser in 2011, an estimated $59.5M; Amazon (AMZN), at $55.2M, is believed to be second. However, these figures are just a tiny fraction of Google's $36B+ in 2011 ad sales, a testament to the extent of its customer diversification.(previously)