After enough passes, you see what you meant, not what you wrote. The proofreader catches the grammar, punctuation, and clarity slips your own eyes skim past, shows each fix as a tracked change you can accept or reject, and works on the real document, citations and formatting untouched.
In the report, the datas was analyzed careful, and it's results is clear.the data was analyzed carefully, and its results are clear.
By the time you finish a draft, you have read it so many times that you see what you meant, not what you wrote. The missing word, the doubled "the", the comma in the wrong place, your brain quietly fixes them as it reads. The proofreader does not have that blind spot. It reads the words that are actually on the page and surfaces the slips you would have sent without noticing.
A red squiggle under a misspelled word is the floor, not the job. The proofreader goes across the entire document for the things spellcheck ignores: subject-verb agreement, tense slips, run-on sentences, missing or stray punctuation, and lines that are simply unclear. It is the difference between a draft that has no typos and a draft that is actually clean.
A proofreader that silently rewrites your text is one you cannot trust. This one shows its work: each fix appears as a tracked change against your original, so you see exactly what it wants to alter and why. You accept the ones that are right, reject the ones that misread your intent, or accept them all at once when you are confident. Nothing changes in your document without your say.
You proofread the actual document, not a stripped-down copy pasted into a checker. Because it runs inside the editor, the proofreader cleans the prose while leaving your headings, citations, tables, and bibliography exactly where they are. The piece you correct is the piece you send, formatting intact, with no rebuilding the layout after the typos are gone.
Run a clean final read over your whole document, with each grammar, punctuation, and clarity fix shown as a tracked change you approve. Your citations and formatting stay exactly as they were. Start free and send it clean.