Marketing Technology has changed, shopping, and tools in this category include a wide array of purpose-built in-store, online, mobile and video-based tools. Observation-based and data-driven tools include site selection, in-store shopper research, store layout design diagrammers, merchandising optimizers, mobile location analytics, catalog builders, payment processing systems, and software for managing promotions, coupons and customer loyalty programs. (See also Retail Marketing: eCommerce, Retail Marketing: Customer Engagement)