Glossary of Key Customer Success Terms

Whether you’re new to Customer Success or refining your strategy, understanding key terminology is essential. Below is a quick-reference glossary of foundational concepts used across SaaS organizations:

Customer Success Manager (CSM)
A CSM is responsible for building strong customer relationships and ensuring clients achieve their desired outcomes using a company’s products or services. They act as a strategic partner throughout the customer journey.

Account Success Plan
This is a structured, living document that outlines a customer’s goals, potential challenges, and the actions required to drive success. It aligns both the customer and the provider on measurable outcomes.

Churn
Churn refers to the percentage of customers who stop using a product or service over a given period. Monitoring churn is critical, as it directly impacts revenue and growth.

Expansion (Upsell/Cross-sell)
Expansion involves increasing the value of an existing customer by introducing additional products, features, or services. This can take the form of upselling (higher-tier plans) or cross-selling (complementary offerings).

Customer Relationship Management (CRM)
A CRM system is used to track and manage customer interactions, storing valuable data such as communication history, preferences, and engagement metrics to support better decision-making.

Quarterly Business Review (QBR)
A QBR is a recurring meeting, typically held every quarter, where teams review progress against goals, address challenges, and identify new opportunities for growth and optimization.

Strategic Account
These are high-value customers with significant long-term potential. They often require a tailored approach, deeper engagement, and more sophisticated success planning.

Stakeholder
Stakeholders include anyone invested in the success of the customer relationship, both internally (e.g., sales, product teams) and externally (e.g., executives, end users).

Use Case
A use case describes how a customer applies a product or service to solve a specific problem or achieve a defined outcome. Strong use cases drive adoption and value realization.

Customer Health
Customer health is a composite metric used to evaluate the likelihood of retention or churn. It typically includes factors like product usage, engagement levels, and customer satisfaction.

Having a clear understanding of these terms helps teams stay aligned, communicate effectively, and ultimately deliver better customer outcomes.