  In the recent years a series of experimental and theoretical efforts have
centered around a new topic: the coherent, cavity-enhanced interaction between
optical photons and solid state magnons. The resulting emerging field of Cavity
Optomagnonics is of interest both at a fundamental level, providing a new
platform to study light-matter interaction in confined structures, as well as
for its possible relevance for hybrid quantum technologies. In this chapter I
introduce the basic concepts of Cavity Optomagnonics and review some
theoretical developments.
