  The recent discovery of Ising superconductivity has garnered a lot of
interest due in part to the resilience of these superconductors to large
in-plane magnetic fields. In this Perspective we explain the basic concepts
that define the behavior of Ising superconductors, provide an overview of the
electronic structure and magnetic properties with a focus on NbSe$_2$,
summarize key experimental observations that have been made in this class of
superconductors, highlight the role that defects and proximity-induced effects
at interfaces have on Ising superconductivity and finally discuss the prospects
for observing Ising superconductivity in bulk materials.
