Manual testing is a software testing process where testers execute test cases without the use of automation tools. Testers manually check the functionality, usability, and overall performance of the software to ensure it meets the specified requirements. This approach allows for a more human perspective, identifying issues that automated tests might miss. During manual testing, testers follow predefined test cases and document their findings. They can explore the application freely, providing valuable feedback on user experience and interface design. This method is particularly useful in the early stages of development or for applications with frequent changes, as it allows for quick adjustments and insights.