This document discusses opportunities for mobile advertising in Vietnam. It notes that Vietnam has over 12 million smartphone/tablet users and mobile searches have increased 500% in recent years. Most Vietnamese mobile users search for information, products, and reviews on their phones. The top industries attracting mobile attention are games, ecommerce, and shopping. However, mobile ad revenue in Vietnam is currently dominated by OTT players like Zalo and Line due to their large user bases. The document provides recommendations for running successful mobile ad campaigns in Vietnam through developing high quality mobile apps and websites and partnering with local mobile ad networks and agencies.