Online or digital marketing is a tool for promoting the sale of services or products via the Internet. It is more than beneficial to businesses as it delivers results and is not limited by geography or time.
Talking about the future is speculative. But to reduce the imprecision, it is necessary to look into the past and understand the present.
Online marketing started with brave individuals who saw the opportunity to connect and started creating websites and taking early action on this great advantage. One of these visionary people is Jeff Bezos founder of Amazon.com - who is an internet enthusiast being the richest man alive with a net worth of over $158 billion as of the time of this writing.
Starting right in the early 2000s social media has created a sizeable space in the virtual world. This phenomenon has really taken off through Facebook - offering also the freedom for businesses to target potential customers in a fairly precise way.
In short, from facebook until now we all know the story and we all are witnesses of digitization.

Right now, the power of digital marketing is incredible generating trillions of dollars. A lot of companies are using this tool and people have come to the conclusion that internet presence is no longer just a way to increase sales, it has become a necessity.
As I said before, to fortell the future is a risky afair, but history shows us that it sides with those who have the courage to take advantage of technology and create a unique path. One thing is for sure - online marketing is only going to grow. Even though it is already very important, I really think we have only scratched the surface of its relevance and usefulness and what digitization can offer as a whole.