Digital Marketing is the process of applying all key ingredients of Digital Designing, Content Writing, Intent, Applied Intelligence, everything that needs to be meant for Promotions, Sales, or Marketing.
The key essence here also is Branding, to showcase who you are and how you respond to consumers.
You yourself can start your own digital marketing with apps that are freely available.
Remember, even if you use free apps, it's just that you should be able to convey your message clearly and with some substance that's required to attract the viewers or audience you are targeting.
If this much you understand then Digital Marketing is easy for you to adopt and use it effectively.
81% of marketers found that increased traffic occurred with as little as 6
hours per week invested in social media marketing.
71% of consumers who have had a good social media service experience with
a brand are likely to recommend it to others.
And note this:
People spend an average of 2 hours and 15 minutes per day on the social media network