Vietnam's digital landscape is evolving rapidly. In 2011, some key digital trends included the growth of mobile applications and augmented reality games on smartphones. Mobile tagging using QR codes was also emerging as a way to provide interactive content and coupons. Location-based services were utilizing online maps for advertising and deals. User-generated content through mobile phones was also increasing, with taking photos and videos being popular activities. Social media sites like Facebook and YouTube were gaining popularity despite some blocking. Group buying online and search engine optimization were also developing as marketing strategies in Vietnam. Integrating digital and offline advertising through techniques like mobile codes on TV and augmented reality billboards was starting to connect people across media.