The person you choose to look over your statement should be checking everything. Along with grammar and spelling errors they should check the tone of the paper, the flow of the paper, and the overall style of the paper. So, it makes sense that the person you choose to look over your admission essay should be well tuned in writing. Additionally, they should also be able to let you know if there is anything they feel you should omit or add. Once you have made the changes they recommend, then you should have them re_read your personal statement to ensure quality. If you want to be ultra_safe, then have yet another set of fresh eyeballs look over your revised personal statement.
This is why so many people choose to opt for help in writing their personal statement for college. For me, it was easy. My mother was an award winning writer, and I could ask her for her feedback any time I wanted (I still can, as a matter of fact) and as often as I want to. Although we don't always see agree, her invaluable input is always intelligent and well thought out. She helped me a lot on my personal statement for college, as well as my essays. But for people who don't have that kind of resource at their easy disposal, or a high school English teacher whose opinion they value, there are many sites and resources all over the internet which can help them to write a personal statement for college professionally. These can give feedback, editing, and can even give you templates and tips advising you the most common things to avoid, and the most important things to do when writing your personal statement for college. In my opinion, though, there is no real alternative to personal, face to face feedback from someone whom you trust on your personal statement for college write up. It is not easy to write a professional personal statement. Most of us struggle with the writing.