An essay is a literary prose form which aims to present facts or ideas in a straightforward and direct method. It was recognized at a much later stage as an independent form of prose. Many a times, it is the unrestricted, free flowing thought-process of the writer presented on the paper. This discussion would deal specifically with how to write an expository essay rather how to write a good expository essay. Firstly, an expository writing is one which is used to explain, describe and inform the reader what a writer wants to convey. Writing an expository essay can be an easy job if the writer follows a few essential steps.