What the grammar checker catches
The checker looks for the mistakes that trip up writers most: subject-verb agreement ("the team are" vs "the team is"), verb tense consistency, run-on sentences, sentence fragments, misplaced modifiers, confused homophones (their/there/they're), article errors (a/an/the) and unclear phrasing.
Each issue comes with a plain-English explanation, so you don't just fix the sentence β you understand why. Over time, that turns repeated corrections into lasting improvement.