Manual testing is a type of software testing in which a tester manually executes test cases without the use of automation tools. It is a process in which a tester manually tests the software to identify defects or bugs.

Manual testing involves manually verifying that a software application or system is working as expected by performing various tests and checks on it. This can include testing the user interface, testing the functionality of the system, testing the compatibility of the software with different devices and operating systems, and testing the performance and scalability of the system.

Manual testing can be time-consuming and labor-intensive, but it can be an effective way to thoroughly test a software application or system. It can be particularly useful for testing complex systems or for testing applications that have a high level of user interaction.

Manual testing is often used in conjunction with automated testing, which involves the use of tools and scripts to perform tests on the software. Automated testing can be more efficient than manual testing, but it may not be as thorough and may not be able to detect certain types of defects.