Regression testing ensures that new changes or updates to an application or system do not adversely affect its existing functionalities. It involves re-testing previously tested functionalities to ensure that they continue to perform as expected after the implementation of new features or changes.

This type of testing is essential as even small changes to an application’s codebase or configuration can potentially cause unexpected bugs or issues to arise. This can be typically performed through a combination of manual and automated testing techniques to ensure comprehensive coverage of all features and functionalities.

By conducting regression testing, our testers can help ensure that new updates or changes do not introduce any unintended negative consequences and that the application continues to perform optimally.