This document discusses a mobile marketing case study conducted by S4M for Subway France. It describes how S4M used location-based marketing to target Subway app users near stores and drive them to purchase with mobile ads. S4M segmented users into exposed and unexposed groups, ran an in-app video campaign, and analyzed post-campaign store traffic. Results showed a 46.72% increase in exposed users visiting Subway stores versus the unexposed control group. Competitor store traffic was also impacted. Branding metrics like clickthroughs, page visits and impressions exceeded targets.