Which innovative product design feature, first introduced by Spotify in 2013, fundamentally changed how users discovered new music and helped the platform differentiate from competitors?

The music industry has undergone tremendous transformation through innovative product design. Streaming platforms have revolutionized how we discover, consume, and pay for music. This trivia question focuses on a pivotal product design decision that helped one streaming service differentiate itself from competitors and gain significant market share. Test your knowledge of the subtle design choices that shaped today's music industry landscape!

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Discover Weekly, an algorithmically personalized playlist that updates every Monday with new music recommendations based on listening habits
The equalizer feature allowing users to customize audio frequencies for different music genres
The 'Behind the Lyrics' integration showing real-time song facts and artist commentary
The collaborative playlist function enabling multiple users to add songs to a shared collection