Abstract.  Superradiance is a phenomenon by which a dissipative spinning object looses angular momentum by amplifying the intensity of scattered radiation, or by producing particles in a bound state. Black hole superradiance, in particular, has received significant attention in the last few years, as it could provide a way of testing indirectly the existence of ultralight particles beyond the Standard Model. In this talk, I will discuss a simple and modern approach of superradiance based on effective field theory techniques. This approach is valid at scales much larger than the size of the spinning object, and it applies not only to black holes but to any dissipative object. Along the way, I will also provide a simple derivation of vacuum friction derivation of vacuum friction---a "quantum torque" that acts on spinning objects in empty space. If time will allow it, I will also comment on the relation between superradiance and tidal dynamics in the Newtonian limit.