I will overview recent advancements in the use of galaxy clusters as cosmological probes. I will first present recent results on the derivation of cosmological constraints from cluster surveys at different wavelengths, also critically discussing the impact of both theoretical and observational systematics. I will then present the role that cosmological N-body hydrodynamical simulations are playing in the characterization of such systematics. In particular I will focus on (i) the calibration of the halo mass function; (ii) the measurement of cluster masses. I will finally highlight the challenge posed by an optimal cosmological exploitation of future large surveys of galaxy clusters, like the one to be provided by the ESA Euclid satellite.
giulia.pagliaroli@gssi.it