Which groundbreaking recommendation algorithm, introduced in 1998, revolutionized e-commerce personalization and was famously described as 'customers who bought X also bought Y'?

Product personalization has transformed how retailers engage with customers, evolving from simple recommendation systems to sophisticated AI-driven experiences. This transformation represents one of retail's most significant technological innovations, changing how consumers discover products and how brands build loyalty. Test your knowledge about a pivotal moment in the evolution of personalized shopping experiences.

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Amazon's Item-to-Item Collaborative Filtering
Netflix's Matrix Factorization System
Walmart's Customer Segmentation Engine
eBay's Bidder Preference Algorithm