Statement of purposes is your business card, your confidential letter to the members of the admissions committee. If not all, then most of the professors on the committees pay great attention to this - in fact, the essay reveals the essence of the person, his aspirations and priorities. And this is not available in the dry numbers of the exam results, the GPA or the stingy CV lines.
That's why you have to take your paper. You should not only be interested in describing yourself and your goals but also do it in accordance with the rules of the university. If you are not sure that you have done everything right, it is better to order the services of sop editing