Segments, sometimes "Demographics" - Why you need this
Demographics define target audiences. In very general cases, this can mean that a demographic might represent a gender, or perhaps an age range. In a more specific case, a demographic might represent shoppers who have been observed inside Walmart locations at least 3 times in the past 2 months.
Demographics are very specific to your needs and are directly related to the audience concentrations that you will read about below.
Those demographics are then available for organizations to use.