Why digital marketing is so successful?

Dooris atomic 212 is a marketing agency in Australia which hereby discusses some facts related to digital marketing's success:

1. Increases traffic on websites.
2. Helps in generating leads.
3. Helps in brand building.
4. Improves the ranking of the program.
5. Helps in improving internal communication.
6. Helps in providing better customer services.
7. Helps in understanding the ever-changing demands and expectations of individuals.
8. What are you taught in the Digital marketing course?