This document discusses the growing use of mobile payments and in-store digital technologies. It notes that by 2017, total smartphones in the world will reach 4.5 billion and mobile payments will reach over $1 trillion annually. The document outlines various mobile payment methods and technologies that are driving this growth, such as NFC and QR codes. It also discusses how retailers can implement in-store mobile payment and location-based loyalty platforms to improve the customer experience through features like proximity marketing and customized discounts.