Need some help with your writing? You are ready to submit that file for publication and you want someone to make sure you have followed the style guide you were told to follow. Maybe you need someone to make sure that the citations are in the proper form. You have put together a family history and now want someone to edit it.
You want this document to be accepted for publication. This is a record of your work that is to be a valuable contribution to your field, but English is not your first language and you want your message to be communicated clearly.
You have finally completed that novel that you have been writing in your spare time over the past ten years and now want another set of eyes to check for consistency in the story line and characterization. You need someone to see if you've made any blunders and to punctuate the dialog correctly.