The term "grammar mistakes" refers to errors made in using proper grammar and sentence structure while speaking or writing. Grammar is a set of rules that dictate how words are arranged, combined, and formatted within sentences to convey clear and accurate meanings. When someone makes a mistake in following these rules, it can result in confusion, ambiguity, or incorrect interpretation of the intended message. Common examples of grammar mistakes include subject-verb agreement errors, misplaced modifiers, run-on sentences, and improper use of punctuation marks. Correcting such mistakes is essential to ensure effective communication and avoid misunderstandings.