  Variability is a common characteristic of magnetically active stars. Flaring
variability is usually interpreted as the observable consequence of transient
magnetic reconnection processes happening in the stellar outer atmosphere.
Stellar flares have been observed now across 11 decades in
wavelength/frequency/energy; such a large span implies that a range of physical
processes takes place during such events. Despite the fact that stellar radio
flares have long been recognized and studied, key unanswered questions remain.
I will highlight what, in my opinion, are some of these questions. I will also
describe recent results on stellar flare emissions at radio wavelengths,
discussing the nature of coherent and incoherent emissions and the prospects of
wide-field radio imaging telescopes for studying such events.
