  A plethora of solar dynamic events, such as the formation of active regions,
the emission of jets and the occurrence of eruptions is often associated to the
emergence of magnetic flux from the interior of the Sun to the surface and
above. Here, we present a short review on the onset, driving and/or triggering
of such events by magnetic flux emergence. We briefly describe some key
observational examples, theoretical aspects and numerical simulations, towards
revealing the mechanisms that govern solar dynamics and activity related to
flux emergence. We show that the combination of important physical processes
like shearing and reconnection of magnetic fieldlines in emerging flux regions
or at their vicinity, can power some of the most dynamic phenomena in the Sun
on various temporal and spatial scales. Based on previous and recent
observational and numerical studies, we highlight that, in most cases, none of
these processes alone can drive and also trigger explosive phenomena releasing
considerable amount of energy towards the outer solar atmosphere and space,
such as flares, jets and large-scale eruptions (e.g. CMEs). In addition, one
has to take into account the physical properties of the emerging field (e.g.
strength, amount of flux, relative orientation to neighbouring and pre-existing
magnetic fields, etc.) in order to better understand the exact role of magnetic
flux emergence on the onset of solar dynamic events.
