Why Protractor?

                           

Use : End to End testing

Advantages

• Test like a user
• Improve test efficiency
• Pain point in testing is it is repetitive. It takes care of it
• It always remembers to check everything
• Protractor runs while we are working
• It would interact with the browser faster then humans
• It would enter data faster then humans

Note: It is built on selenium

For more information :
https://docs.angularjs.org/guide/e2e-testing