Exploratory testing, is all about discovery, investigation and learning. It’s like Machine learning, in concept. It empathizes on learning and adaptability. While the software is being tested, the tester learns things that together with experience and creativity generates new good tests to run. It emphasizes on personal freedom and responsibility of the individual tester. Exploratory testing is done without any specific plans and schedules. Test cases are not created in advance but testers check system on the fly. They may note down ideas about what to test before test execution. The focus of exploratory testing is more on testing as a “thinking” activity.