Which groundbreaking algorithm, first widely implemented in 1998, revolutionized e-commerce by enabling personalized product recommendations based on user behavior patterns?

E-commerce has transformed dramatically since its inception. From simple online catalogs to sophisticated personalized shopping experiences, technological innovations have revolutionized how we shop online. This trivia question explores a pivotal development that fundamentally changed how online retailers understand and cater to their customers, leading to the hyper-personalized shopping experiences we encounter today.

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Collaborative Filtering
Neural Network Classification
Quantum Preference Analysis
Hierarchical Clustering Protocol