Testing by using software tools which execute test without manual intervention is known as automated testing. Automated testing can be used in GUI, performance, API, etc.

Automated testing refers to the use of software tools and scripts to perform tests on software applications, systems, or components without human intervention. In automated testing, the testing tools execute pre-scripted tests on the software under test and compare the actual results with expected results. This approach aims to improve the efficiency, effectiveness, and coverage of the testing process.

Automated testing offers several advantages, including:

Efficiency: Automated tests can be executed faster than manual tests, allowing for quicker feedback on the software’s quality.
Reusability: Test scripts can be reused across different phases of the development life cycle, reducing redundancy and saving time.
Consistency: Automated tests are not prone to human errors, ensuring consistent and reliable test results.
Repeatable: Tests can be executed multiple times with the same input conditions, helping identify and reproduce issues consistently.
Parallel Execution: Automated testing tools can run tests concurrently on multiple environments, speeding up the testing process.
Regression Testing: Automated tests are particularly useful for regression testing, ensuring that new code changes do not negatively impact existing functionality.

Despite these advantages, it’s important to note that automated testing is not a one-size-fits-all solution. There are scenarios where manual testing is more appropriate, such as exploratory testing, usability testing, and certain types of ad-hoc testing. The decision to use automated testing depends on factors like the nature of the project, the type of testing required, and the available resources.