What does an editor do?

Figuring out what services are right an author can be confusing, so I am going to be posting more content about the different roles and services that Polyverse provides. Here is a video from The Publishers Association answering the question, What does an editor do?

"A great breakdown of what an editor provides, along with the nuances of the relationship between the author and editor as a project moves along." https://www.youtube.com/watch?v=Zb0Tyxi5ksM&feature=youtu.be