Which music streaming platform first introduced algorithmic personalized playlists that automatically update weekly based on user listening habits?

Music streaming services have transformed how we discover and consume music through sophisticated product innovations. Behind these platforms are complex recommendation algorithms that personalize the user experience. This poll tests your knowledge about a significant product innovation milestone that changed how consumers discover new music in the streaming era.

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Spotify with 'Discover Weekly' (2015)
Apple Music with 'For You' playlists (2014)
Pandora with 'Personalized Stations' (2013)
YouTube Music with 'My Mix' (2016)