  In this talk I will review the current status of the constraints on the
neutrino properties from cosmological measurements, with a particular focus on
their mass and effective number. I will also discuss the existing tensions
within the context of the \lcdm\ model, including the discrepancies on the
Hubble parameter and on the matter fluctuations at small scales, and how
neutrinos could help to alleviate the aforementioned problems.
