Mobile is becoming increasingly important for CRM as smartphones achieve widespread adoption. Case studies show how companies like Ribena, O2, Walkers and Shelter use mobile to engage customers, run promotions, and improve their brands. When developing a mobile campaign, objectives, audience and channels must be considered. Working with mobile agencies is important for strategy, design, apps, SMS, media planning and more. Various platforms exist for SMS, apps, and mobile websites. Analytics can track mobile activity. Good mobile site design makes products easy to view, provides fresh content, and offers personalized experiences.