The service called "copyediting" corrects errors in spelling, punctuation, grammar and style. As a group they are called "mechanical" errors.
Copyediting may be requested together with, or apart from, manuscript feedback. Proofreading and fact-checking also count as copyediting. Always have a second person check your manuscript and your page proofs for errors. The author alone cannot catch them all. I have seen books whose whole first printings had to be destroyed because they contained an embarrassing number of errors —a very expensive outcome for an entirely preventable problem.About BookEval Fees