Which retail analytics innovation, first widely adopted in the early 2000s, revolutionized customer tracking by connecting online and in-store behaviors of individual shoppers?

Modern retailers rely on sophisticated analytics to understand customer behavior and optimize operations. From basic sales tracking to AI-powered predictive models, the retail analytics landscape has evolved dramatically over recent decades. This trivia question explores a significant milestone in the development of retail customer analytics that changed how businesses understand consumer behavior.

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Cross-channel customer identification (CCCI) systems
Radio-frequency identification (RFID) inventory tracking
Facial recognition customer profiling
Social media sentiment analysis algorithms