OOH retargeting enables Firefly to remessage the mobile devices of users that have been exposed to OOH executions (Digital Tops, Wraps, Experientials) to ultimately amplify the brand message in a variety of ways. These tactics can range from immediate retargeting, where a user can be reached within seconds of seeing an ad on their mobile device, to days later in which users are reached within omni-channel / cross-device environments, essentially bridging the gap between the offline and online worlds.