This document discusses the ubiquity of mobile devices and apps. It notes that smartphones and tablets are everywhere, with the majority of people owning smartphones. It then discusses how brands can build a presence on mobile through apps. It provides tips for app development, noting that apps should focus on performing a single task well. The document also covers various mobile platforms, technologies for building apps, distributing apps through stores, security considerations, hardware features, and bringing mobile and BYOD policies together in companies.