The digital rail campaign for Wrigley's Extra gum was successful in increasing brand awareness and driving sales. It illustrated how a digital-only campaign using rail posters can boost advertising awareness by 25% and increase the likelihood of purchasing the product among regular gum buyers. The posters delivered a clear and interesting message that strengthened perceptions of the brand. Product sales grew by 15% during the campaign and 8% after it, showing that the digital posters were effective at driving both immediate and sustained sales.