Briefly, I would be able to edit, revise, and organize a document- whichever one is needed. For instance, if you bring a document to me (e.g. a research paper, an essay, a page in a book), and you need for it to be organized (make sure all things are in their proper areas), grammatically sound (maybe in your college paper you've mistakenly used the word "all together" when you should have used "altogether"), revised (maybe after I have detected any errors, you want all the corrections to be allocated to their proper places, to polish your writing- or maybe not)- which altogether constitutes editing- I can yield that service to you.
On the plus side, I would also be able to assist potential clients in grasping a particular piece of writing or document, that may be too complicated to comprehend. For example, let's say that you are a college student and you have homework due, but there is a textbook passage in the way of you turning in your assignment on time, all because it is too complicated to grasp (e.g. it's a 'bunch of rhetoric'). I would be able to break it down for you in its most simplest form, to where you can both understand and grasp it with ease, so that you can turn in your assignment on time.