CIMM DEFINITION: The audience breakdown of aggregated, segmented characteristics, often reported as a percentage, based on such elements as age, gender, income, education, household characteristics etc.

2: The relation between average audience of a specific target and the average audience of the reference target (e.g. total households) with regard to the same daypart and channel. (Source: Kantar Media Audiences)

NOTE – Since current Set-Top Box data is delivered by different data providers and in different footprints, standard audience composition levels and even the overall audience may vary greatly across processors and providers. Issue of weighting.