Which e-commerce giant was first to implement item-to-item collaborative filtering for product recommendations, a system they patented in 2001 that revolutionized personalized shopping?

In the competitive landscape of e-commerce, personalization algorithms have transformed how consumers discover products. Behind these sophisticated systems are technological innovations that have reshaped the retail industry and consumer behavior. Test your knowledge about the pioneering recommendation engine that changed online shopping forever and set new standards for customer engagement in digital retail.

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Amazon
eBay
Alibaba
Walmart