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The Madison Avenue Field GuideA field guide to marketing & advertising, by Brandon Mina

GlossaryEmail & LifecycleSegmentation

Email & Lifecycle

Segmentation

Dividing an audience into groups by shared traits or behaviors so messages can be tailored to each.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

Segmentation is the practice of dividing an audience into groups by shared traits or behaviors so messages can be tailored to each. Segments may be based on demographics, purchase history, engagement or lifecycle stage. Targeted messages are generally more relevant than one-size-fits-all sends, improving engagement and reducing unsubscribes and complaints.