Either you need social media or search engine marketing, my knowledge in content writing, link building, blogging, etc, is capable of giving you better online presence. The fact that I have created my own website instead of signing up on upwork and freelancer, and you are here reading my content, I can assure you that I have knowledge for this field.
While my skill set from data entry is basically a bonus from working online, digital marketing is actually my primary in online career. As for digital marketing I offer:
I. Search Engine Marketing