Proofreading

By the time a document is ready to be proofread, it should have already been edited. This means its content should already be well organized, written, and easy to understand. Editing also involves removing errors, but it focuses more on making sure the document makes sense as a whole.

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Proofreading, on the other hand, is about finding errors, both small and large, that were either missed or introduced during editing. This ensures that the document's final draft is completely free of grammatical errors (e.g., subject–verb agreement problems, incorrect word choices, improper punctuation usage, and incorrect spelling) as well as formatting and typographical errors. It also makes sure the document adheres to the chosen style guide.