This document discusses how mobile technology is transforming retail by removing barriers for customers. It notes that customers want the cheapest prices, products always in stock, discounts, and to avoid long queues. New mobile services from PayPal like CheckIn and Concierge help retailers provide better customer service experiences by offering features like order ahead and concierge services. Integrating these types of mobile payments and e-commerce tools can help retailers adapt to changing customer demands and expectations.