Everyone.
I was tempted to just leave it at the first paragraph. Concise, meaningful, true. But it’s a bit flip and less than helpful. So let me elucidate.
There are two kinds of writers: good ones and not-so-good ones. In each category there are subsets. They have different strengths and shortcomings, but they all have one thing in common: They all need an editor.
And it’s nothing personal or judgmental. Your editor is your first reader (or one of them), a new pair of eyes, disinterested, experienced. She focuses on your writing her ability to see what is good about it and what needs work — how to clear away the extraneous so your meaning comes through.
More soon.