How to Improve SEO for Digital Marketing Company

[JoeyWunsch]

My name is Odelin and I am new to the marketing industry. I am working on building my own digital marketing business and was wondering if anyone had any suggestions as to what would be a good way to get some strong Dofollow backlinks back to my page for improving my SEO. I have been doing the marketing course at Udemy and it has been helpful but most of the things I have learned are for businesses that sell products. I would be selling a service. Any suggestions or tips would be greatly appreciated! Thanks in advance!