It depends on many factors. Simply put, you need test automation in the following cases:
- With many projects under development, it makes sense to automate testing from the beginning rather than manually executing each test.
- There are hundreds or thousands of tests your organization needs to run regularly.
- Manual testing takes too much time because you need specialized knowledge or QA specialists with complex expertise.
Moreover, automated testing tools are much faster and more reliable than manual testing methods, which can be time-consuming and prone to human error. As well as automated regression testing, you can use automation tools for checking performance and security, as well as testing whether any new changes have broken existing functionality.