Manual testing is the oldest and most rigorous type of software testing that requires a tester to perform manual test operations without automation help. It is a laborious process requiring patience and other qualities from testers. A manual tester would typically understand functionality, prepare a test environment, execute test cases manually, verify results, record pass/fail, summarize results in a report, publish the report, and record any new defects found. While manual testing is thorough, test automation has become necessary due to shorter deadlines, but manual testing remains crucial and cannot be completely substituted.