Which analytics technique revolutionized music retail by enabling the famous 'customers who bought X also bought Y' recommendation system first popularized by online music retailers?

The music retail industry has undergone massive transformation in the digital era. While streaming dominates music consumption, physical media and merchandise remain crucial revenue streams for artists and retailers. Advanced analytics have revolutionized how music retailers understand customer preferences, optimize inventory, and create targeted marketing campaigns. Test your knowledge about how data drives decisions in the modern music retail landscape!

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Collaborative filtering
Time series analysis
Sentiment analysis
Cohort analysis