Google’s approach to software increasingly centers around personalized recommendations and assistance. It will filter your email and surface only the messages you need to see, pop up alerts if your train line goes out of service, and even chat with you about the latest scores and trades from your favorite sports team. Today that same approach comes to Google’s music service, Google Play, which is being revamped to focus on contextual recommendations.

Using machine learning and clues like location, activity, and weather, the app tries to serve up a smorgasbord of playlists that will match your mood and moment. “At a high level, Google’s mission is to make the world of information really accessible and useful to people,” said Elias Roman,…

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