What is test automation with example?
Test automation is the process of making sure that the design and implementation of software works by performing tests that require very little human involvement.
Automated testing software can also enter test data, compare expected results with actual results and generate detailed test reports.
There are multiple free and Open Source Test Autoamtion tools like Selenium,Appium, Cypress however few tools requires considerable investments of money and resources like TestComplete.
https://www.softwaretestinghelp.com/automation-testing-tutorial-1/