AdS/CFT and especially its broader form, Gauge/Gravity duality, have been found to be a perfectly adapted tool to investigate the strongly coupled regime of condensed matter systems. I will present the example of the holographic Mott insulator as a well-tractable effective model for regimes of the Mott-Hubbard model, that are hard to access by conventional means like DMFT. I compare DMFT results with holographic results, finding that the comparatively easy language of classical gravity is able to describe Mott physics accurately well. A result of special interest is an emerging duality between zeroes and poles in the fermionic Green's function, which allows a mapping of the theory formulation from a Fermi liquid to a strongly interacting insulator and vice versa.