Smartphone owners have learned to cope with the extra power drain in-app advertising can cause, but accidentally launching a web browser? That's a frustration that lasts forever. Google's hoping to mitigate the pitfalls of clumsy thumbs, however, by introducing two-step click-through for mobile ads. Text banners served through AdMob will now display a humble blue arrow on their starboard side -- clicking here takes the reader directly to the advertiser's preferred destination; touching anywhere else expands widens the blue square to coax users into giving the ad a confirmation click, just in case they fumbled the advertisement by mistake. The team's preliminary tests show that confirmed ad clicks sport a notably higher conversion rate, indicating that folks who clicked through the ad actually meant to. Google says solving what it calls the "fat finger problem" will be beneficial to the ecosystem as a whole. We prefer to think of our fingers as grand.