Retesting is a software testing technique that involves executing test cases again for a software application or system after defects have been fixed or changes have been made to ensure that the defects have been resolved and the changes made have not introduced new defects.
The purpose of retesting is to verify that the previous defects have been fixed and that the application or system is working as expected. It is an important part of the software testing process as it helps to ensure that the application or system is functioning correctly and meets the specified requirements.