Abstract: A system and method delivers marketing messages based on location specific check-ins. This permits highly targeted communications directed at first entities such as persons, organizations, or businesses who are patrons of second entity locations which are typically businesses. Selection of first entities is based on detection of past or potential patronage of second entities through social media or other public digital content check-ins. Check-ins are analyzed to identify any second entity referred to and associating such reference to the author of the content. Second entities, such as a merchant or brand, may be explicitly determined from meta-data of source content, or implicitly through processing such as natural language analysis or association through a third entity. Second entities use such connections to deliver targeted marketing messages through a public social media profile of the first entity. Analytics may be used to track of check-in patterns and effectiveness of marketing campaigns.