According to research by GoldSpot Media, up to 50 per cent of clicks on static mobile banner are purely accidental.
In a blogpost, Google said that most accidental clicks on in-app image ads happen at the outer edge of the ad unit, likely when you’re trying to click or scroll to nearby content.
To address this issue, Google's new "confirmed clicks" ad unit will conrfirm with users if they meant to cick on the ad.
"In our initial tests, we found that confirmed clicks notably improve mobile conversion rates, with a slight decrease in clickthrough rate as accidental clicks are avoided," wrote Allen Huang, product manager, mobile display ads at Google.