Absolutely! Actually, you should have a couple of individuals to proofread your essays. You can ask your parents, teachers, friends, college counselors, and mentors. Now, there are plenty of admission coaching companies that can provide you with expert advice on your essays. Also, it may be a good idea to get a small group of classmates together and each can give feedback on each other's essays through the admission process. Nonetheless, when someone proofreads your essay, they can catch any grammatical errors, provide feedback on what you were attempting to express and what they read, and raise any red flags that could hurt your essays. With recent reports of cheating and plagiarism, it is prudent to write your own essays because admission officers want to learn about you in your own words.