Which retail innovation, introduced in 2003, first used collaborative filtering algorithms to create personalized product recommendations at scale for online shoppers?

Throughout retail history, technological innovations have transformed how customers shop and how businesses understand consumer behavior. One particular breakthrough in the early 2000s revolutionized retail personalization, creating the foundation for the sophisticated recommendation algorithms we see today. This poll tests your knowledge of this pivotal retail technology development that changed how stores connect with customers on an individual level.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Amazon's Item-to-Item Collaborative Filtering system
Walmart's Smart Shopping Cart technology
Target's Guest ID predictive analytics program
Best Buy's Adaptive Customer Experience (ACE) platform