Which pioneering retail personalization technology was introduced by Target in 2012, allowing them to predict customer pregnancies and life events based on subtle changes in purchasing patterns?

In the rapidly evolving world of retail, personalization technologies have revolutionized how businesses connect with consumers. From basic recommendation engines to sophisticated AI-driven solutions, these technologies have transformed the shopping experience. This trivia question explores a significant milestone in the development of retail personalization algorithms that changed how retailers understand and predict consumer behavior.

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The Predictive Guest Analytics system
Amazon's collaborative filtering algorithm
Walmart's Customer DNA platform
The Netflix Prize recommendation model adapted for retail