* Drafting: Focus on getting your ideas down. Don't worry too much about grammar and mechanics at this point.
* Revising: This is where you focus on the big picture – content, organization, argumentation, and overall effectiveness. You might catch some glaring errors here, but the primary focus is on substance.
* Editing: This is where you focus on sentence-level issues: grammar, style, clarity, word choice, and tone. This is the primary stage for error correction.
* Proofreading: This is the final stage, focused on surface-level errors like typos, spelling mistakes, punctuation, and formatting. It's best done after a break from the writing, with fresh eyes.
Therefore, while you might spot and correct some errors during drafting and revising, the dedicated stages for targeting errors are editing and proofreading.