  The study of transient and variable low-frequency radio sources is a key goal
for LOFAR, with an extremely broad science case ranging from relativistic jets
sources to pulsars, exoplanets, radio bursts at cosmological distances, the
identification of gravitational wave sources and even SETI. In this paper we
will very briefly summarize the science of the LOFAR Transients key science
project, will outline the capabilities of LOFAR for transient studies, and
introduce the LOFAR Radio Sky Monitor, a proposed mode in which LOFAR regularly
scans 2 pi radians of sky.
