Lazy applicants simply write about the first thing on their minds, and usually, they finish the essays in record time. These applicants, however, may not be given a chance for interviews by submitting a very poor admission essay.
Different schools hold different methods of filtering their hundreds of applicants. As an applicant, you should know that there are two main kinds of essay prompts: the general and the specific.
Even if the academic program you are applying for is not a language course, admissions officers who are tasked to read your essay would hate it if your personal statement is riddled with subject-verb agreement errors and so many misplaced punctuations. Beware of this trap.