What makes a good personal statement that will impress a university I want to go into?

Writing a personal statement is a challenging task but I would say that as long as you genuinely believe in what you are saying and are passionate about going to a particular university you will be able to write an impressive personal statement. You should keep your essay focused on why you want to study this particular subject and what makes you passionate about it. You should also focus on the particular university so a good idea would be to research it beforehand and know its strenghts and weaknesses.