Although test automation has its advantages, it is not practical to automate all kinds of testing. Some testing can be done only by a human tester, such as user interface testing, usability, and accessibility testing.
Exploratory testing is another type of testing where a human tester provides more value than an automated test. In exploratory testing, a tester explores the software randomly, just as an end-user would do, and tries to find the bugs or UI inconsistencies or any hidden problems that developers might have overlooked.
Automated testing is helpful for large projects involving complicated calculations and for repeatable test cases. For features that change often and rarely executed test cases, a human tester provides a bigger ROI than automation would.
