What is manual testing and why is it important?

Manual testing is the process of executing software tests manually without the use of automation tools. Testers follow predefined test cases, interact with the application, and verify that the observed behavior matches the expected outcome. Manual testing is important because it allows human judgment to catch usability issues, visual defects, and edge cases that automated scripts might miss. It is especially valuable during early development, exploratory testing, or when the test environment is unstable. Manual tests also provide immediate feedback to developers and stakeholders, fostering communication and ensuring that the product meets user expectations. While automation can scale coverage, manual testing remains essential for quality assurance, especially in complex or rapidly changing systems.