What is the main purpose of User Acceptance Testing (UAT)?

The main purpose of User Acceptance Testing (UAT) is to ensure that the business and functional requirements are met. During UAT, end-users validate the system or product developed against their needs and specifications before it goes live. This phase of testing is critical as it helps confirm that the solution is ready for deployment and functions as expected in a real-world scenario, directly ensuring it can effectively support users' tasks and workflows.

In this context, other options do not align with the primary goal of UAT. Monitoring budget adherence is a concern typically addressed in project management rather than user acceptance. Approving marketing strategies is unrelated to the testing phase of a product's development, and while customer service training is valuable for improving user experience, it does not pertain to verifying the functionality and usability of the system itself through user acceptance testing.