The characteristics of human populations and population segments, especially when used to identify consumer markets. Common groupings are:
Questions you should answer within your business plan:
Check consumer data resources (print and online), polls and surveys, U.S. Census, (see government sources) and newspaper and journal articles. See links below.
Competitor websites may give you some great ideas about buying trends as well.
Also, look for industry publications and trade journals. These will be very helpful with trends, suppliers, marketing ideas and much more.