  We review sterile neutrinos as possible Dark Matter candidates. After a short
summary on the role of neutrinos in cosmology and particle physics, we give a
comprehensive overview of the current status of the research on sterile
neutrino Dark Matter. First we discuss the motivation and limits obtained
through astrophysical observations. Second, we review different mechanisms of
how sterile neutrino Dark Matter could have been produced in the early
universe. Finally, we outline a selection of future laboratory searches for
keV-scale sterile neutrinos, highlighting their experimental challenges and
discovery potential.
