As mentioned, this part of your application can be used to decide whether a school wants to invite you for an interview or not. Schools only accept students who have been invited for interviews, so getting to this step is a huge part of the process.
Meanwhile, not a few schools require a third type of application document, which is the Question and Answer (Q and A) essay. Although this may take the form of a quasi_PS, the questions require that you answer them in a specific manner. This essay usually ranges from 300 to 600 words, thereby limiting the amount of information that should be included. Nevertheless, Q and A essays belong to an entirely different category and will not be explained here. Instead, in the following useful guide, we will explain everything you need to know in creating your own PS and offer useful suggestions to help you polish your essay further.