2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211814I will be reviewing three methods to identify late-type giants in extragalactic systems, based on the main characteristics of AGB stars (they are infrared bright, variable, and have spectral peculiarities).Invited review in: ``Why Galaxies Care About AGB Stars'', Eds. Franz Kerschbaum, Corinne Charbonnel, and Bob WingAstrophysicstext