This document discusses using Apple's Passbook mobile wallet for marketing purposes. It provides an overview of Passbook, how companies currently use it, and best practices. Passbook allows storing digital passes for things like boarding passes, tickets, and loyalty cards. The document outlines how retailers like Target and Gap implement Passbook and highlights opportunities for improvement. It also discusses Waterfall Mobile's Passbook capabilities and a 4-step approach to effective Passbook marketing.