Published January 29, 2015 5:09pm EST | Updated May 21, 2015 1:28pm EDT

YouTube Viewer Time Up 50%, Chief Business Officer Says

Google Inc. Chief Business Officer Omid Kordestani told analysts on the company's conference call that YouTube viewer time is up 50%. Google is also seeing big momentum in mobile ads on YouTube. The company has also boosted tools to let advertisers know whether their ads were actually seen.