What Does Regression Testing Mean?
Regression testing is a type of software testing used to determine whether new problems are the result of software changes.
Techopedia Explains Regression Testing
Regression testing is essential for large software applications, as it is often difficult to know whether changing part of an issue has created a new issue for a different part of the application. For example, a change to a bank application loan module may result in the failure of a monthly transaction report. In most cases, issues may appear to be unrelated, but may actually be the root of frustration among application developers.