Reciting "segmentation, targeting, positioning" is not a structure. In a first-round marketing case I score, candidates who name the three letters and stop usually leave the targeting box empty. The interviewer already knows the acronym. What the sheet rewards is a quantified pick: which segment, how big in reachable dollars, and why that group should prefer this offer over the realistic alternative.
STP is a marketing-textbook decision sequence. In a case interview, only the targeting step earns hard points, and only if you turn it into segment size × reachable share × margin. Positioning is the short sentence that makes that pick credible. Segmentation is setup; I cover the cut logic elsewhere in the customer segmentation guide.
After this piece you will run one targeting equation aloud, compare two segments on the same basis, and state a positioning choice without drifting into a product-feature dump.
Where STP actually comes from
STP did not start on a case-prep whiteboard. The demand-side idea behind segmentation lands in Wendell R. Smith's July 1956 Journal of Marketing article "Product Differentiation and Market Segmentation as Alternative Marketing Strategies". Smith argued that when demand is heterogeneous, you adjust product and marketing effort to distinct buyer groups instead of treating the market as one homogeneous pile.
The modern three-step sequence is the managerial packaging in Philip Kotler's Marketing Management. The current Pearson edition (Kotler, Keller, and Chernev) still separates the work into identifying segments and target customers, then crafting a value proposition and positioning. That is the origin you should have in your head: textbook strategy tool, not firm interview folklore.
The American Marketing Association defines marketing as creating, communicating, delivering, and exchanging offerings that have value. STP is how a marketer decides where that value is aimed and why a specific group should accept it. It is not a synonym for the marketing mix; product, price, place, and promotion are how you deliver after the target is chosen (see the 4Ps case guide if that is the prompt).
What the scoring sheet actually rewards
Bain's public hiring pages describe case interviews as a way to see how you work through a problem with structure and precision. Naming STP is not that work. Translating it into a decision tree with numbers is.
| Move in the room | What it sounds like | Score impact |
|---|---|---|
| Acronym recital | "I would use STP: segment, target, position." | Near zero. Signals reading, not thinking. |
| Segmentation only | Four demographic buckets, no economics. | Weak unless the cut changes the decision. |
| Quantified targeting | Size × reach × margin, then a lead segment. | This is where points land. |
| Positioning as choice | Frame of reference + one reason to prefer. | Locks the recommendation. Feature lists do not. |
Use STP when the client decision is who to serve and why they would choose the offer: launch, stalled growth with broad awareness, repositioning, adoption, or channel strategy. Skip it when the bottleneck is cost, capacity, or pure pricing math. If the question is whether the industry is worth entering at all, start with attractiveness or competitive structure first; STP assumes you are already picking customers inside a market.
Segmentation is setup, not the answer
Keep the first step short. Split the market on the driver that changes willingness to pay, cost-to-serve, channel, or switching friction. Demographics are labels for reach; needs and occasions are usually the strategic cut. If two groups get the same offer at the same price through the same channel, you did not segment in Smith's sense.
I will not re-teach the four classic bases here. When the interviewer presses on how to cut, use the sibling piece on customer segmentation. For STP, your job after a clean cut is to stop listing segments and start ranking them.
The only targeting math that earns points
Targeting has two layers. Coverage strategy answers how many segments you serve (one concentrated bet versus several differentiated offers). Lead-segment choice answers which group you lead with. In interview time, the second layer is where candidates leak points, because they pick the "largest" or "hottest" group without converting it to economics.
Use one equation for every surviving segment:
Segment value ≈ segment size × reachable share × contribution margin per customer (or per unit)
- Segment size is the number of buyers or buying occasions in the period you care about.
- Reachable share is the fraction you can actually get in front of with the client's channel, brand, and budget in year one. Not theoretical market share. Reachable.
- Contribution margin is price minus variable cost (and, when the case gives it, incremental cost-to-serve). Gross revenue without margin is how people pick a trap segment.
Screen out segments you cannot measure, cannot reach, or cannot serve differently. Then compare the rest on the equation above versus ability to win (capability, brand permission, channel access). Concentrated targeting is the default when resources are limited; differentiated coverage only if the case shows enough scale and distinct needs to justify two offers.
| Failure mode | What candidates say | What I want instead |
|---|---|---|
| Biggest segment wins | "Parents are the largest group." | Size × reach × margin for parents versus the runner-up. |
| Share without reach | "We can take 15% of the market." | Why 15% is reachable with this channel in year one. |
| Revenue without margin | "Segment A has more revenue." | Contribution, including cost-to-serve if it differs. |
| Cover everyone | "Differentiated across all four." | One lead segment now; expand only if economics clear. |
Ned's rule. If you cannot put a dollar figure on the segment you just named, you have not targeted yet. Labels are free; reachable contribution is the test.
Worked example: HarborLatch cargo mount
HarborLatch makes a frame-mounted cargo lock for e-bikes. The client wants a U.S. launch focus for year one. Three need-based segments survive a quick screen.
Assumptions the interviewer confirms (plausible, inventable in the room):
| Segment | Size (buyers) | Reachable share (Y1) | Contribution margin / unit | Segment value |
|---|---|---|---|---|
| Urban delivery riders | 800,000 | 25% | $180 | $36.0M |
| Suburban parent utility riders | 2,400,000 | 8% | $95 | $18.2M |
| Campus students | 1,100,000 | 40% | $45 | $19.8M |
Arithmetic you can say aloud:
- Delivery: 800,000 × 0.25 × $180 = $36.0M
- Parents: 2,400,000 × 0.08 × $95 = $18.2M
- Campus: 1,100,000 × 0.40 × $45 = $19.8M
Parents are the largest pool. Campus is the easiest to reach. Delivery still wins on segment value because margin and reachable share compound. Ability to win also favors delivery: fleet managers buy in batches, and HarborLatch already has a pilot with two regional couriers.
Recommendation shape: concentrated year-one target on urban delivery; keep campus as a later channel experiment; do not lead with parents until retail distribution and brand proof exist.
That is targeting as a decision, not as a vocabulary word.
Positioning is a choice, not a feature list
Once the target is set, positioning answers why that group should prefer HarborLatch over the realistic alternative. Kotler's managerial framing is frame of reference, points of parity, and points of difference. In the room, compress it:
For [target], HarborLatch is the [category] that [one decisive reason], unlike [alternative].
For delivery riders: For urban courier fleets, HarborLatch is the frame-lock cargo mount that installs without tools in under thirty seconds, unlike strap-on bags that fail under wet loads.
Rules that keep positioning scoreable:
- Name the alternative the buyer actually considers (bags, rear racks, nothing), not an abstract competitor set.
- One decisive reason tied to the target's job, not five product attributes.
- Do not smuggle pricing, channel, or promotion into the sentence; those belong in the mix after the target is locked.
If your positioning would work unchanged for every segment you listed, your targeting was fake.
When STP is the wrong first move
| Prompt type | STP role | Better first lens |
|---|---|---|
| New product / who to win | Core | Then layer launch economics |
| Growth with broad awareness | Core | Check channel waste and mix |
| Market entry | Useful after "enter?" | Attractiveness / entry mode first |
| Cost takeout | Weak | Cost tree |
| Capacity expansion | Weak | Throughput and demand risk |
Bain notes that case interviews reward logical structure and precision. A framework recited without a decision is neither.
Practice the targeting equation today
Take any marketing launch prompt. Spend eight minutes only on targeting: name three segments, invent plausible size / reach / margin with the interviewer (or yourself), fill the table, pick a lead. Then write one positioning sentence. Do not open a 4Ps discussion until that sentence exists.
If you want a timed first rep with instant scores, start at /start (three typed turns, no account). For a full voice case and seven-score debrief, use /interview. Structure pressure lives in /drills/structure. Everything is open for seven days, no card; then $120 for a recruiting season or $49 a month.
CoachNed is independent and not affiliated with McKinsey, BCG, Bain, Deloitte, or any firm named above.
Frequently asked questions
What does STP stand for in marketing?
STP stands for segmentation, targeting, and positioning: divide the market into decision-relevant groups, choose which group to serve, and define why that group should prefer the offer. The managerial sequence is standard in Kotler's Marketing Management; the underlying segmentation idea traces to Wendell Smith's 1956 Journal of Marketing article.
How do you use STP in a case interview?
Treat it as a tool, not a recital. Cut segments on a driver that changes economics, score each with size × reachable share × margin, pick a lead (usually concentrated coverage), then state one positioning sentence against a real alternative. Stop if the case is really about cost or capacity.
What is the difference between targeting and positioning?
Targeting chooses the customer and the coverage approach. Positioning chooses the mental slot for that customer relative to alternatives. You can target correctly and still fail positioning by listing features with no frame of reference.
Is STP the same as the 4Ps?
No. STP decides who you serve and why they should choose you. The 4Ps (product, price, place, promotion) are the mix you design for that choice. Confusing the two is a common first-round slip.
Do I need to name undifferentiated and differentiated strategies?
Only if coverage breadth is the decision. Knowing concentrated versus differentiated signals fluency; inventing a multi-segment plan without economics usually costs points. Lead with one quantified segment unless the case forces portfolio coverage.
Sources
- Product Differentiation and Market Segmentation as Alternative Marketing Strategies (Smith, 1956) — JSTOR — Primary academic origin of market segmentation as strategy. Checked 2026-09-24.
- Marketing Management, 16th edition (Pearson catalog) — Kotler, Keller, and Chernev chapters on segments/targets and value proposition/positioning. Checked 2026-09-24.
- Definitions of Marketing — American Marketing Association — AMA definition of marketing as value creation and exchange. Checked 2026-09-24.
- Our Hiring Process — Bain & Company — Firm framing of case interviews as problem-solving assessment. Checked 2026-09-24.
- Interviewing — Bain & Company — Public note that case interviews reward logical structure and precision. Checked 2026-09-24.