The document discusses communicating with mobile users and some key considerations. It notes that mobile communication faces structural problems like decreasing signal strength and interference. It then provides statistics on mobile phone and technology usage among average adults, teens, and seniors. It also outlines five common "mobile personas". Additional sections cover the importance of mobile, multi-screening behaviors, the effectiveness of local mobile searches and location-based marketing, A/B testing for mobile, designing sites and emails for mobile, and some pitfalls to avoid in mobile marketing.