Digital advertising spend grew to £10.3 billion in 2016, up 17.3% from 2015, with mobile now taking the majority of that budget. In fact, mobile display ads now account for over 50% of all display advertising. But many advertisers are still grappling with one question: how much should they invest in mobile web ads versus in-app ads?
https://www.clickz.com/in-app-advertising-vs-mobile-web-advertising-which-is-the-better-investment/112937/