What is regression testing

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Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing features.

Regression testing is performed after code changes to verify that the existing functionality still works correctly.
It helps in identifying any defects introduced by new code changes.
Automated testing tools are often used for regression testing to save time and effort.
Examples of regression testing include running test cases that cover critical functionalities of the application.
Regression testing is an important part of the software testing process to maintain the quality of the application.