How do you segment a market?

Market segmentation means grouping customers or prospects who share relevant characteristics and may respond similarly to an offer. It is not intended to describe the whole population. It improves decisions about products, messages, prices, channels and commercial priorities.

Saying the target consists of Italian companies or women aged 25 to 55 is not enough. The group is broad but not necessarily useful. Sound segmentation separates people or organisations when that distinction genuinely changes how they buy, use or assess the offer.

Which criteria are used to segment a market?

In B2C, you can begin with geographical, demographic, psychographic and behavioural variables. Location, age and income are easy to identify but often explain little by themselves. Purchase frequency, price sensitivity, usage occasion, desired benefit and loyalty may be closer to the decision.

In B2B, useful variables include industry, size, territory, technology, organisational maturity and purchasing model. The situation also matters. A company that must replace a critical system within six months behaves differently from one exploring a future improvement, even when their size and industry are identical.

Criteria can be combined, but every variable adds complexity. If you create twenty segments without the data, budget or offers to manage them, the precision exists only on paper.

How do you build usable segments?

Start with the decisions you want to improve. Are you choosing a market to serve, adapting an offer or allocating budget? Then gather evidence from sales data, analytics, interviews, support and observed behaviour. Look for repeated differences, not isolated episodes.

Formulate a segmentation hypothesis and describe each group’s need, context, barrier, expected value and observable behaviour. Verify that the segment is:

• identifiable using available data;
• substantial enough to justify a choice;
• reachable through realistic channels;
• different from others in its response to the offer;
• compatible with company capabilities and positioning.

A segment is useful when it enables you to predict a difference and act. If two groups receive the same offer, message and journey, there is probably no reason to keep them separate.

What is the difference between a segment and a target?

Segmentation describes the parts of the market. Targeting decides which parts the company will serve with greater focus. You may recognise an attractive segment and still choose not to pursue it because the cost of reaching it is too high, competition is strong or the organisation cannot keep the promise.

Assess attractiveness and fit separately. Attractiveness considers size, growth, margins, accessibility and competitive pressure. Fit considers expertise, reputation, channels, operational capacity and strategic direction. A large market is not automatically the right market.

The company may concentrate on one target, differentiate across several groups or use a common offer with limited variations. The answer depends on resources. A medium-sized business can rarely maintain the same depth across many segments at once.

Do buyer personas replace segmentation?

No. A segment is a group defined through criteria and evidence. A buyer persona is a representation that makes the needs, questions and behaviour of a customer or decision-maker more concrete. It can help people create content or design experiences, but it cannot prove by itself that the group exists or is financially attractive.

In B2B, distinguish the organisation from the people involved. The business may be the target while the user, technical lead, procurement team and management have different objectives and concerns. One fictional persona cannot represent a buying committee.

How do you test segmentation over time?

Connect each segment to observable signals: response rate, conversion, acquisition cost, margin, frequency, retention and support requests. Compare results without confusing behaviour with different levels of promotional pressure. A group contacted ten times more often is not necessarily more interested.

Review segments when the market, technology, data or offer changes. Also document the rules through which a person or company is assigned to a group. If sales and marketing classify the same customer differently, no personalisation will be reliable.

How do you document segments?

Give every group a descriptive name rather than a creative label that hides the criteria. “Manufacturers with distributed plants and reactive maintenance” makes membership recognisable. Add inclusion rules, exclusions, the need, behaviour and missing evidence.

The review should include lost customers and rejected opportunities. Observing only buyers can confuse attractiveness with selection produced by current channels. You may discover a valuable group that does not appear in the database because the proposition, language or process prevents it from reaching the point of contact.