Systems and methods for providing promotional materials to potential customers are described. In some cases, the described methods include obtaining GPS coordinates of a merchant's location. In some cases, the methods further include providing a map showing the locations of customers in a promotion area, wherein a merchant is able to resize the promotion area to increase or decrease how many customers are in the promotion area. In some cases, the merchant further produces a text or other electronic promotion, optionally sets a time period in which such promotion is effective, and provides the promotion to customers within the promotion area. In some cases, as customers enter the merchant's location with their electronic devices that received the promotion, and during the promotion's effective period, the described systems match such devices' GPS coordinates with the GPS coordinates of the merchant's location to register conversions on the promotion. Other implementations are described.