Mobile usage is growing rapidly worldwide. Over half of adults in Europe and the US own smartphones, and smartphone usage exceeds 90% of the population in many countries. The rise of mobile is impacting consumer media consumption and behavior, with many using their phones for activities like social networking, video viewing, searching, e-commerce, and display advertising. Advanced targeting and analytics are providing opportunities for mobile advertising, with mobile click-through rates significantly higher than desktop. While fragmentation remains a challenge, marketers can optimize cross-device campaigns and gain insights through improved tracking and reporting of mobile ad performance.