In a case whereby a company has a product that is geared toward 18-21 year-old women, who are all college students, this group would be considered market segment.
Market segment can be described as the people who are grouped together for marketing purposes.
It should be noted that the Market segments serves as the part of a larger market, which help to bring the individuals together with respect to a common features.
As it can be seen in the question we can see that there was a grouping which involves the product that is geared toward 18-21 year-old women, the can be seen to have been segmented to a specific group of people which can be considered as one form of the marketing techniques that is been used by the company.
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