Spotify is the big daddy of music streaming. It suggests millions of songs to millions of users every day. But have you ever wondered how it exactly does it? Well, it uses its own algorithm called Bandits for Recommendations as Treatments. And it doesn't just end there, there's a lot of other clever science behind it. We explain that, and a lot more in this episode of Elemental where we talk about the smaller things in tech that make a much bigger impact on the real world.