for different age will demand different products such as Teen Vogue strange purchased new, while older people to choose products and services that are necessary and prudent in buying more the younger.
set: a formally organized group consisting of every male (or female) of comparable age. In those societies chiefly identified with the practice, a person belonged, either from birth or from a determined age, to a named age set that passed through a series of stages, each of which had a distinctive status or social and political role. Each stage is usually known as an age grade.