Brick & Mortar Retail uses Bluetooth technology to gather customer behavior data in stores such as dwell time in aisles and session duration. This real-time data is measured through sensors and existing Bluetooth radios to track customer loyalty IDs, profiles, and paths. Retailers can use the data and real-time APIs with their existing backends and third party platforms to engage customers with targeted ads, push notifications, and digital signage based on business rules. The service is billed per sensor and retailers can use existing Bluetooth or purchase new sensors.