Neutrino Masses in Cosmology

We review the status of neutrino mass constraints obtained from cosmological observations, with a particular focus on the results derived considering Cosmic Microwave Background (CMB) data by various experiments (Planck, ACT, and SPT), Baryon Acoustic Oscillation (BAO) determinations and other late-universe probes. We discuss the role played by priors and parameterizations in the Bayesian analyses, both at the time of determining neutrino masses or their ordering, and compare cosmological bounds with terrestrial constraints on both quantities.