Online ad viewability has long been an issue for publishers, with it being difficult to determine exactly how many people are actually viewing the ads served on a web page. And with interactive advertising spend hitting the $800 million mark this year, it seems more important than ever that advertisers know they’re getting the eyeballs they’re paying for. So, in response to the issue, MediaWorks has taken action, announcing today it’s guaranteeing all of its banner ads will be 100 percent viewable from 1 April, using Google’s DoubleClick product. We chat to MediaWorks head of digital sales and ad strategy John-Paul Randall about the change in functionality as well as the publisher’s other new function, which allows unblockable video ads to run across all platforms.