Definition: What is literature? Why do we read it? Why is literature important?

Literature is a term used to describe written or spoken material. Broadly speaking, "literature" is used to describe anything from creative writing to more technical or scientific works, but the term is most commonly used to refer to works of the creative imagination, including works of poetry, drama, fiction, and nonfiction.
Generally, most people have their own ideas of what literature is. When enrolling in a literary course at university, you expect that everything on the reading list will be “literature”. Similarly, you might expect everything by a known author to be literature, even though the quality of that author's work may vary from publication to publication. Perhaps you get an idea just from looking at the cover design on a book whether it is “literary” or “pulp”. Literature then, is a form of demarcation, however fuzzy, based on the premise that all texts are not created equal. Some have or are given more value than others.
Most forays into the question of “what is literature” go into how literature works with the reader, rather than how the author set about writing it. It is the reception, rather than the writing, which is the object of enquiry. Largely, what we call “literature” is often a subjective value judgment, and naturally, value judgments, like literary tastes, will change.
Etymologically, literature has to do with letters, the written as opposed to the spoken word, though not everything that is written down is literature. As a classification, it doesn't really have any firm boundary lines. The poet Shelley wanted to include some legislative statutes of parliaments under poetry because they created order and harmony out of disorder. There is recurring agreement amongst theorists though that for a work to be called literature must display excellence