the.com/demographics

The stats that explain why ads keep calling you 'young adult' at 40.

means The measurable traits of a population — age, income, gender, location, and the like — used to describe or target groups of people.

from Built from Greek 'demos' (the people, as in democracy) plus '-graphy/-graphics' (writing or description, as in photography). So literally 'description of the people' — a 19th-century coinage for the then-new science of counting populations, which marketers later borrowed to sort you into a bracket.

origin
Greek for people-writing, literally describing crowds
marketing use
Used to sort you into buckets before you buy anything
trap
Averages hide wild variation within every group
destiny myth
Predicts tendencies, not individuals, despite confident headlines
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