Unmeasurable marketing funnel Tools have been developed for marketing funnel in e-commerce due to the digital traceability of customers. However, the quantification of the sales funnel in brick-and-mortar stores remains elusive due to technological limitations. Lack of awareness regarding sales potential Retail chains face challenges in enhancing sales performance, enhancing customer expe- rience, and refining inventory management to achieve sustained success in the fiercely com- petitive retail market. Misrepresentation of marketing ROI Marketing ROI is merely measured in terms of espite the significant advancements in digital marketing funnel systems, precise measure- ment of marketing ROI remains a challenge.