  The diffuse light in clusters of galaxies, or intracluster light, has
attracted a lot of attention lately due to its potential in describing the
assembly history of galaxy clusters and to explain the observed growth of the
brightest cluster galaxy with time. The properties of this light (color,
stellar populations, extent) give clues about its formation and, consequently,
the processes that shape the cluster. Here, I will present a review on
intracluster light, its history, properties and the particular observational
problems and limitations associated with the study of this diffuse component in
integrated light.
