  Heavy quarkonium is one of the most investigated probes of the medium
produced in heavy-ion collisions. In the past few years progress has been made
in the description of its in-medium dynamics from QCD. Non-relativistic EFTs in
particular allow one to define and compute rigorously the potential governing
the real-time evolution of the bound state from QCD, showing that it is
composed of a real and an imaginary part. The latter encodes the effect of
scattering with the light constituents of the plasma and is oftentimes
responsible for the dissociation of the bound state. The EFT approach and its
main results, as well as comparisons with recent lattice data and
phenomenological applications, are briefly reviewed here.
