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

GlossaryB2B & GrowthCustomer Success

B2B & Growth

Customer Success

A function that proactively helps customers achieve their goals with a product, driving retention, renewals, and expansion.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

Customer success is a business function that proactively helps customers achieve their goals with a product after purchase. Unlike reactive support, it focuses on onboarding, adoption, health monitoring, and regular check-ins. In subscription businesses, customer success drives retention, renewals, and expansion revenue, directly influencing net revenue retention and lifetime value.