Segmenting the marketing properly is an important step in marketing. But then we need to describe the customers in the various segments.
Describing customers is important for various reasons. First, we may want to target the segment but more precisely target one or more descriptors in that segment. Thus, we may be able to still play in a segment but do so by targeting a smaller niche. Second, descriptors are extraordinarily useful for all of the marketing tactics that must be used to reach a target segment. For example, knowing where a segment shops is useful for setting distribution channels. Understanding a customer's knowledge set will be useful to setting communication objectives. Thus, the more richly we are able to profile the customers in the various segments, the easier it will be to set marketing tactics later on.
So what kinds of descriptors do we need? These might fall into four main categories and differ to some extent depending on whether we are segmenting consumers or businesses.
Beginning with consumers, we might first think in terms of basic characteristics such as demographics (age, income, occupation, education, etc.) and family stage (kids, ages, etc.). We could also describe them by their psychographics that includes values, personality and lifestyle variables.
One well-known way to think about these psychographics is with a tool known as VALS (Values and Lifestyle Survey), conducted by a company called SRI. You can read up on this subject if you wish (a good article, "Markets with Attitude," appears in American Demographics magazine, July 1994, pp. 22-33 by Judith Waldrop). Here is where you will find such groups as the "strivers" (image conscious, spend money on clothing and personal-care products, etc.), "believers" (buy American, slow to change habits, look for bargains, etc.), and the "fulfilled" (little interest in image or prestige, likes educational and public affairs programs, etc.). I should note that sometimes these descriptors might actually segment a market (Suzuki is an example), but more often they serve as descriptors of the people in a segment.
With businesses, such characteristics are typically associated with size, industry sector, or end-equipment. Thus, a company selling a component to another company may describe a segment by the equipment the customer is using the component for. Stage of a company can also be a basic descriptor, such as whether it is a startup or mature company.