The document discusses mobile advertising trends in 2011-2012. It notes that mobile ad formats were not well-developed or standardized at the time. Remnant mobile inventory was becoming more important but was still underutilized. Mobile CPM prices in Eastern Europe were lower than in Western Europe but growing, and new ad formats like HTML5 and video were emerging. The document concludes that the mobile advertising industry needed to better plan for mobile growth and inventory, and provide platforms to help sellers manage inventory across desktop and mobile channels.