As an institution of higher learning, every university wants to be considered as the very best in the field so as to attract the best students. Reputation takes a long time to build but can easily be destroyed, that is why no university will admit a student who according to them does not have the intellectual capacity to perform well in that university. This explains why the requirements of a university admission essay will vary from one university to another. The higher a university ranks the more stringent their requirements are likely to be.