  We review the reduction of four-dimensional N=1 Seiberg duality to three
dimensions focusing on the D brane engineering approach. We start with an
overview of four-dimensional Seiberg duality for theories with various types of
gauge groups and matter content both from a field-theoretic and a brane
engineering point of view. Then we describe two families of N=2
three-dimensional dualities, namely Giveon-Kutasov-like and Aharony-like
dualities. The last part of our discussion is devoted to the 4D/3D reduction of
the dualities studied above. We discuss both the analysis at finite radius,
crucial for preserving the duality in the dimensional reduction, and the
zero-size limit that must be supported by a real mass flow and a Higgsing,
which can differ case by case. We show that this mechanism is reproduced in the
brane description by T-duality, supplying a unified picture for all the
different cases. As a bonus we show that this analysis provides a brane
description for Aharony-like dualities.
