Which music streaming service was the first to introduce algorithmic personalized playlists that became an industry standard feature?

The music industry has undergone massive transformation with the rise of streaming platforms. What started as physical media sales evolved through digital downloads to today's subscription-based streaming models. This shift fundamentally changed how artists release music, how revenue is generated, and how consumers discover new content. Test your knowledge about this pivotal product marketing transformation that reshaped an entire industry!

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Spotify with its 'Discover Weekly' feature (launched 2015)
Apple Music with its 'For You' recommendations (launched 2015)
Pandora with its 'Music Genome Project' recommendations (launched 2000)
Amazon Music with its 'My Discovery Mix' feature (launched 2016)