Spotify is testing the addition of individually personalized tracks to existing editor curated playlists, multiple sources tell Hypebot. In one example, tracks which Spotfy's believes would fit the taste of a particular user were added to an official Spotify hand curated workout playlist.
The test is rolling out to select users globally and only on sme mid-tier playlists. If successful, the feature will be expanded to all users and more playlists.
In addition to providing a more personalized experience, the feature could also help combat playlist burnout by delivering a continually evolving song list.