Which technology innovation first enabled large-scale retail personalization that could analyze customer behavior in real-time and deliver dynamic product recommendations?

Modern retail personalization has transformed dramatically with technology advancements. Beyond simple demographic targeting, today's retailers leverage sophisticated data analysis and AI to create individualized shopping experiences at scale. This poll tests your knowledge about a key innovation that revolutionized how retailers personalize customer interactions and recommendations across digital platforms.

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Collaborative filtering algorithms that identify patterns across similar customers' preferences
RFID tracking systems that monitor in-store customer movements
Beacon technology that sends proximity-based notifications to customers
Blockchain systems that securely store customer preference data