Manual testing involves testers performing test cases without the help of scripts or tools, ensuring that the software behaves as expected. It is time-consuming and more prone to human error, but it is crucial for exploratory and usability testing. On the other hand, automated testing uses scripts and tools to perform repetitive tasks more efficiently and accurately. It is ideal for regression testing, ensuring that new code doesn't break existing functionality. For those seeking to enhance their testing skills, Uncodemy offers advanced training programs, helping professionals gain expertise in both testing techniques.