  We address the phenomenology of light sterile neutrinos, with emphasis on
short-baseline neutrino oscillations. After a review of the observed
short-baseline neutrino oscillation anomalies, we discuss the global fit of the
data and the current appearance-disappearance tension. We also review briefly
the effects of light sterile neutrinos in $\beta$ decay, neutrinoless
double-$\beta$ decay and cosmology. Finally, we discuss the future perspective
in the search for the effects of eV-scale sterile neutrinos.
