Which machine learning technique was first used by Amazon in the late 1990s to revolutionize product recommendations in online retail?

Recommendation systems power many modern shopping experiences, using complex algorithms to predict what customers might want next. But do you know the science behind these powerful retail tools? Test your knowledge of the algorithms and techniques that make personalized shopping recommendations possible!

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

Collaborative Filtering
Neural Networks
Reinforcement Learning
Random Forest Classification