The list can be seen as a mix of telcos, financial institutions and retailers essentially. Compare the impression gap between Amazon and BestBuy and the rest of the group for that matter.
As part of its analysis AdGooroo compared mobile search rankings on the PC and smartphones. Amazon turns out to be the top paid-search advertiser on both platforms. But there were a number of gaps between PC and mobile rankings/performance. For example, WellsFargo “ranked #9 in Mobile Search, with 11.5 million impressions, but 137 in Desktop/Tablet Search, with 12 million impressions.” There were a few advertisers that saw more mobile than PC search impressions. But equally there were advertisers, such as Wal-Mart and JCPenney, that ranked well on the PC but not as well in mobile search results. As of last year Google began compelling marketers to buy both PC and mobile search campaigns and set the PC bid as the floor, as a practical matter, for the campaign. Mobile bids can be adjusted up or down, depending on a number of variables including location. In other words marketers can specifiy a premium they’re will to pay to get in front of smartphone users within a certain radius from a business location. Informally this week a Google employee at a conference dropped a bomb, saying that mobile search was projected to exceed PC search traffic by the end of the year. This was a casual remark as I understand it and not necessarily an official Google statement. In addition, I heard it second hand so I don’t have more context to share. It’s not clear what’s included in “mobile search” query volume here (i.e., Maps, mobile web, apps)? It’s also unclear whether this is US only or global projection.