Abstract: A marketing method comprises categorizing consumers based on their buying profile and transmitting tailored advertisements to each of those categories. The method includes the steps of completing an on-line questionnaire, assigning numerical values to answers provided by the consumer, performing arithmetic calculations based on those answers, and comparing the results of those arithmetic calculations to determine which of a plurality of categories applies to the consumer. Depending on the category of the consumer, a different advertisement tailored to the specific buying profile of that category can be transmitted, such as by electronic mail, back to the consumer. A web-based marketing system carries out this method.