What is the difference between MLA APA and Chicago turabian?

For example: APA (American Psychological Association) is used by Education, Psychology, and Sciences. MLA (Modern Language Association) style is used by the Humanities. Chicago/Turabian style is generally used by Business, History, and the Fine Arts.

Why does MLA exist?

Why Use MLA? Using MLA Style properly makes it easier for readers to navigate and comprehend a text through familiar cues that refer to sources and borrowed information. Editors and instructors also encourage everyone to use the same format so there is consistency of style within a given field.

Why are headings and subheadings important?

Headings and subheadings represent the key concepts and supporting ideas in the paper. They visually convey levels of importance. Differences in text format guide readers to distinguish the main points from the rest. Headings are generally bigger, if not more conspicuous, than subheadings.