Software Testing

Bug Severity indicates how serious the bug is and reflects its impact on the product and customers of the product. It can be critical, major, minor, cosmetic or suggestion
Critical severity: The bug is of critical severity if it causes system crash, data loss or data corruption
Major severity: The bug is of major severity if it causes operational errors, wrong results and loss of functionality
Minor severity: The bug is of minor severity if it causes defect in user interface layout or spelling mistakes