Testing assesses the quality and performance of a software before release, and helps in determining the product's behavior. Software testing requires testers to verify that the system meets the requirements and also validates that the system will meet user needs.

UAT is distinct from all other types of testing. Instead of bug-finding, its primary focus is on validating how easy and satisfying the product is to use by recreating real-life scenarios. It also assesses the overall look and feel to determine the end-users’ comfort level. UAT helps to track user responses when they interact with the application. When a developer designs a feature, they will have been guided by their understanding of the requirements. If the design functions as intended, the designer’s interpretation and implementation will be confirmed during UAT. It is not the purpose of UAT’s output to provide solutions, but to reveal any issues missed during the actual development and testing cycle.

• Verifies that the system works as expected according to functional specifications.
• Includes tests such as unit, integration, system, and acceptance testing.
• Focuses on validating inputs, outputs, and data processing.
• Ensures error handling and graceful recovery from unexpected inputs.