Revision is a good time to eliminate the cliches that came so easily to mind while rushing the draft, and the ambiguities that could not be clarified while discovering new ideas. And revision is sentence combining and word subordination. But primarily, revision means you are revisiting ideas, reenvisioning the lay of the argument, and making adjustments so that this version of your writing is in accord with the ideal version in your head. Skilled writers often use revision checklists and use their writing goals and plan to measure their work. They often seek feedback from critical readers.
Professional writers submit copy to their editors.
Invention activities that generate ideas help generate revisions. Reading compositions aloud often helps writers identify areas they like and dislike. Asking questions about the topic and the text helps also. Although writers edit as they draft and revise, I am presenting editing as an activity that occurs after writers have closed their texts to further revision. Editing in this instance is proofreading.