Which retail analytics technology first popularized the use of 'heat maps' to visualize customer movement patterns within physical stores?

In modern retail, understanding customer behavior in physical stores has become increasingly sophisticated. Technology now allows retailers to track how customers move through stores, where they linger, and which displays attract the most attention. This poll tests your knowledge about one such revolutionary technology that changed how retailers analyze in-store traffic patterns and optimize store layouts for maximum engagement and sales.

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RFID tracking systems
Overhead thermal imaging sensors
Bluetooth beacon networks
NFC-enabled shopping carts