How Effective Are Ebook Marketing Services for New Authors?

Hi everyone,

I’ve been exploring different strategies for promoting digital books, and one area that keeps coming up is ebook marketing services. From what I’ve read, these services can help with everything from boosting visibility on Amazon to running targeted campaigns on social media.

For authors who are just starting out, investing in marketing can feel overwhelming, especially when balancing writing costs with promotional needs. I’m curious to know has anyone here used ebook marketing services before? Did you see measurable results in terms of book sales, audience growth, or online presence?