Styles and Contents
Styles enable a user of Word to create ‘sets’ of formatting that can be used repeatedly throughout a document. For instance, if you wanted to make sure all of the headings in your document appeared the same way, you could create a style with all the necessary formatting and apply that style t each of your headings, which would be a lot quicker than individually formatting each one. Additionally, once a style has been used in a document, changing the formatting for that style will change any parts of the document that use that style. This makes it possible to modify the formatting of several sections all at once. In short, when you use a style, you can use several formats in one simple step.
Using styles in a document not only simplifies formatting and helps to keep formatting consistent within a document, it can also be used to assist in the generation of special Word objects such as document Indexes and Tables of Contents