Systems and methods for tracking the sales of products and presence of advertising materials within a physical store are provided. According to certain aspects, a sensor component disposed within the physical store may detect light emitted by a unique product identifier (UPI) affixed to a product. A processor of the sensor component may analyze the detected light to determine the UPIs, generate a digital representation of the UPIs within a field of view, and transmit at least a portion of the digital representation to a server computer. A plurality of sensor components may track the movement and sales of various products and presence of advertising materials in the physical store, and the server computer may analyze the resulting data to improve merchandising and the sales experience for customers, among other benefits.