Environment Shaping Galaxies: Spectroscopy of Cluster Galaxies

In this paper I present some recent and new results regarding the effects of the cluster environment on the star formation history of galaxies. Three main aspects are discussed: the differences in the stellar population ages of cluster ellipticals and S0 galaxies; the comparison of the spectroscopic properties of galaxies in distant clusters and in Coma; and the incidence and properties of faint post-starburst/post-starforming galaxies in the Coma cluster.