1. The report is easily plug-gable for any test automation tool Selenium, RestAssured, UniRest and Appium
2.  The report gives historical data on pass and faliures
3.  It gives summary view of pass and fail test cases
4. It shows the failed test cases and reasons for failures
5. The TestNG PDF Matrices Report also provides test automation related matrices. 
6. Lot of graphs provides information for managerial decision making.