Glossary/B2B & Growth/Customer Success
B2B & Growth
Customer Success
A function that proactively helps customers achieve their goals with a product, driving retention, renewals, and expansion.
By Brandon Mina·CEO, BrandPilot AI·Updated 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.