Metallicity can tell us a lot about

Metallicity can tell us a lot about a particular cluster. It can be used to estimate the age and stellar mass of the cluster. This is done by comparing sets of standard isochrones to the cluster, and determining which set shares a similar history by matching stellar parameters, such as metallicity. Metallicity also places the cluster into a galactic context by demonstrating where and how the cluster fits into the history of the chemical evolution of the galactic disk. Metallicity is also important in the study of the evolution of surface lithium in stars as different metal content is expected to impact stellar evolution and when stars burn lithium present at the surface.