  We review the ILC capabilities to explore the electroweak (EW) sector of the
SM at high precision and the prospects of unveiling signals of BSM physics,
either through the presence of new particles in higher-order corrections or via
direct production of extra EW gauge bosons. This includes electroweak precision
observables, global fits to the SM Higgs boson mass as well as triple and
quartic gauge boson couplings.
