Which innovative data-driven feature did Spotify introduce in 2015 that revolutionized music retail by personalizing the customer journey?

The music industry has undergone massive transformation in how products are delivered and consumed. From physical media to digital downloads to streaming services, each evolution has brought new retail strategies and consumer behaviors. This trivia question focuses on how streaming platforms have utilized data analytics to revolutionize music retail and marketing approaches.

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Discover Weekly, which uses collaborative filtering and natural language processing to create personalized playlists
Audio Aura, which analyzes listening patterns to assign color schemes to user profiles
Retail Radio, which allows brick-and-mortar stores to customize in-store playlists based on customer demographics
Purchase Prediction, which recommends vinyl records and merchandise based on streaming preferences