Some self publishing companies offer "promotion" assistance as part of their service packages for authors. But you need to understand what that means! I explain some of the terminology so you know what you're buying!
Resource: How to write a press release: https://toughnickel.com/industries/How-to-Write-a-Press-Release-for-a-Small-Business
Resource: How to distribute a press release: http://heidithorne.hubpages.com/hub/Where-to-Submit-a-Press-Release-So-It-Gets-Read
2018 Self Publishing Survey Results (YouTube video): https://youtu.be/IDejdrEyVHU
2018 Self Publishing Survey Results (Podcast): https://heidithorne.podbean.com/e/survey-how-much-do-self-published-authors-make-the-heidi-thorne-show-episode-66/
YouTube video: https://youtu.be/K7DFTK0Y9N0
Timestamp show notes (click on timestamp to view segment on YouTube):
0:13 Self Publishing Survey update
0:46 Self publishing company "packages"
1:36 Book promotion is not the same as book marketing and advertising
2:46 What self publishing companies mean by "book distribution"
4:33 What self publishing companies mean by "press releases"
7:16 Why the talk shows won't want you as a guest
7:41 What self publishing companies mean by "viral promotion"
9:41 Why you have to do your own book marketing