  In this contribution, I have outlined recent precision measurements of the
standard model (SM) multiboson production at CMS. A study of diboson production
at 5 TeV constitutes an important probe of the SM at a new energy, and the data
favour NNLO predictions obtained by MATRIX. A study of WZ production at 13 TeV
constitutes the most comprehensive study of WZ production to date, containing
inclusive and differential cross section measurements, charge asymmetry
measurements, constraints on the LHC proton parton distribution functions, and
constraints on anomalous values of the WWZ trilinear gauge coupling. No
evidence for new physics is found, and all the results favour SM predictions
calculated at NNLO using MATRIX.
