For questions about customer satisfaction (a measure of how products and services supplied by a company meet or surpass customer expectation).

Wiki definition:

Customer satisfaction is a measure of how products and services supplied by a company meet or surpass customer expectation.

Definition according to "Marketing Metrics: The Definitive Guide to Measuring Marketing Performance" book:

The number of customers, or percentage of total customers, whose reported experience with a firm, its products, or its services (ratings) exceeds specified satisfaction goals.