What is Market Segmentation?
Market segmentation is the process of grouping potential customers so that members of the same group respond similarly to a marketing program. The goal is not to maximize the number of segments — it is to find segments that are measurable (you can size them), accessible (you can reach them through a channel), substantial (large enough to be profitable), and differentiable (they need different offers). Marketers slice using four families of variables: demographic, geographic, psychographic, and behavioral. The deeper the variables, the more actionable the segment.
How Market Segmentation actually works
The framework breaks down into the following moving parts. Knowing what each piece is — and what it is not — is what separates a B-grade answer from an A-grade answer in a written assignment.
- Demographic — age, gender, income, occupation, education, family stage
- Geographic — country, region, city size, climate, neighborhood
- Psychographic — values, lifestyle, personality, attitudes (often via VALS or PRIZM)
- Behavioral — usage rate, occasion, benefits sought, loyalty status, readiness to buy
- Test for the four criteria — measurable, accessible, substantial, differentiable — before committing
A worked example: Nike
Nike segments by psychographics first, demographics second. The "performance athlete" segment is defined by attitudes (competitiveness, identity tied to sport) rather than by age or income. That same attitude shows up in a 14-year-old basketball recruit and a 45-year-old marathoner — Nike sells to both via the same "Just Do It" voice but different product sub-brands (Jordan, Nike Running). A purely demographic competitor would split those buyers into different campaigns and lose the unifying brand promise.
Don't lose marks for these
- Segmenting on variables you cannot measure or reach (e.g., "people who feel adventurous on weekends")
- Creating dozens of micro-segments that you cannot afford to serve separately
- Skipping the four criteria test and ending up with segments that look pretty in slides but cannot be marketed to
- Confusing segmentation with targeting — segmentation finds the slices, targeting picks which to serve
How to use this on the exam
Score-maximizing moves
- Use the STP sequence: Segment → Target → Position. Examiners look for it explicitly
- Justify your segmentation variables with the four criteria
- Show one demographic and one psychographic variable for credibility
When to use Market Segmentation (and when not to)
Use Market Segmentation when your assignment asks you to analyze, structure, or recommend — and when you have at least two data points to populate every cell of the framework. Skip it when the question is asking for a numerical answer or a single recommendation, since Market Segmentation is a structuring tool, not a calculator.