Advantages of automation

There are many advantages of automation:

1. Useful to execute the routine tasks like smoke tests and regression tests. 
2. Useful in preparing the test data. 
3. Helps to execute the test cases which involve complex business logic.
4. Good to execute the cross platform test cases (like different OS, browsers etc.) 
5. Great to execute the test cases which are a bit difficult to execute manually. 
6. When the number of iterations of the test case executions are not known.