Segmentation means choosing the right recipient group for a defined purpose. The objective is not to collect as much data as possible, but to avoid messages that are irrelevant to the person receiving them.
Choose criteria that change the message
Start with simple information that genuinely affects the content: selected service, location, membership status or expressed interest. If the same message and offer suit everyone, you may not need another segment.
Separate assumptions from facts
A completed action is a firmer basis than a loose assumption about interest. Explain how information is used and check that the purpose is compatible with the basis on which it was collected.
Test carefully and maintain lists
Begin with manageable groups, compare response and opt-outs, and avoid firm conclusions from small samples. Remove stale data and combine segments that no longer create a meaningful distinction.
Find the smallest useful segment
A good segment is large enough to be practical but distinct enough to change the message. Start with two or three understandable groups rather than many small combinations that nobody can explain. Record why each criterion is used, who owns the definition and when the group should be reviewed.
Check privacy before delivery
Ask whether the information is necessary, whether recipients have been informed and whether the purpose matches the reason the data was collected. Restrict who can export or change lists. A maintained suppression list must always take precedence over a new import or segment.
A relevant next step
Make the next campaign more relevant
Plan recipients, wording, timing and follow-up as one coherent journey.
