Hey Bindu, Selenium is widely used as an automation testing tool as it is the simple and easy to use among all testing tools. Its record and playback feature makes it exceptionally easy to learn with minimal acquaintances to any programming language. Selenium IDE is an ideal tool for a beginners and learning users. Selenium should be selected as a testing tool because:
- It is a free and open source tool,
- Have a large user base and helping communities,
- Have cross Browser compatibility (Firefox, Chrome, Internet Explorer, Safari etc.),
- Have great platform compatibility (Windows, Mac OS, Linux etc.),
- Supports multiple programming languages (Java, C#, Ruby, Python, Pearl etc.),
- Supports distributed testing, etc.
For more details about test automation strategies and methodology, You can get a better understanding with the Automation testing online course.