  The field of spin hydrodynamics aims to describe magnetization dynamics from
a fluid perspective. For ferromagnetic materials, there is an exact mapping
between the Landau-Lifshitz equation and a set of dispersive hydrodynamic
equations. This analogy provides ample opportunities to explore novel
magnetization dynamics and magnetization states that can lead to applications
relying entirely upon magnetic materials, for example, long-distance transport
of information. This article provides an overview of the theoretical
foundations of spin hydrodynamics and their physical interpretation in the
context of spin transport. We discuss other proposed applications for spin
hydrodynamics as well as our view on challenges and future research directions.
