Gray Box Testing is a software testing technique that combines elements of both White Box Testing and Black Box Testing. Testers have partial knowledge of the internal workings of the application, allowing them to design test cases that focus on both the user interface and the underlying code. This approach helps identify issues that may not be visible through either of the other testing methods alone. By leveraging this dual perspective, Gray Box Testing can improve the overall quality of the software. It enables testers to create more effective test scenarios, ensuring that both functional and structural aspects of the application are thoroughly evaluated before release.