  We (try to) pedagogically explain how monopoles arise in QCD, why maximal
Abelian(MA) gauge is ``special'' for monopole study, the Abelian projection in
MA gauge, its resultant degrees of freedom(photons, monopoles and charged
matter fields), and the QCD-equivalent action in terms of these degrees of
freedom. Then we turn to more recent developments in the subject: Abelian
dominance, large $N$ behavior of Abelian projected QCD, mass of the charged
matter fields, notion of an effective photon-monopole action obtained by
integrating out the charged matter fields, and problems encountered in the
recent evaluation of this effective action using the microcanonical demon
method on the lattice.
