Unlike the writer, online grammar checkers are totally unconcerned with the meaning of your sentence and are simply following a predefined set of rules. While there is no doubt that they are useful, relying on them is highly dangerous. In education, poor punctuation and grammar will cause you to lose marks in essays. Good punctuation and grammar will not only improve your marks, but, used skilfully, can make your arguments more persuasive and engaging.

Almost all employers, and certainly those recruiting for 'graduate level jobs', view effective written communication as a highly desirable skill. It is also a skill that many potential candidates lack; improving your understanding of grammar and punctuation could help you into the career of your choice. Once in your 'graduate level job', you will almost certainly be engaging with the written word in some way. Clearly-written, grammatically-correct, properly-punctuated reports are likely to catch your manager's eye for the right reasons.