Google Shares Drop After Earnings Disappoint - NYTimes.com

Still searching for a mobile advertising solution

"But the explosion of mobile users and ads has presented difficulties. Google has 55 percent market share in mobile ad revenue, and 95 percent for mobile search ads, according to eMarketer, the digital advertising research firm. Yet the ads cost less in large part because advertisers are not yet convinced that they are as effective as desktop ads.
People click on ads on smartphones more often than they do on desktop computers, 5.1 percent compared with 2.4 percent of the time, according to Marin Software, which makes technology for advertisers to use to buy ads on Google, Bing, Facebook and other sites.
That is because ads take up more space on cellphone screens and are more likely to answer the kinds of immediate questions asked on mobile devices, like “Where is a bar near the ballpark?” said Gagan Kanwar, director of research and partnerships at Marin."

Google Shares Drop After Earnings Disappoint - NYTimes.com