  The penetrating nature of electromagnetic probes makes them an ideal
candidate to study properties of the Quark-Gluon Plasma (QGP). A selection of
recent developments in the theory and phenomenology of electromagnetic probes
is discussed, with an emphasis given towards how these probes can be used to
constrain QGP trapnsport coefficients. A Bayesian treatment of electromagnetic
radiation, similar to the one of soft hadronic observables and jets, is
suggested as a path towards imposing more stringent constraints on various
transport coefficients of the QCD medium.
