A style object represents the formatting and layout of characters or paragraphs within the text of a topic object in the Author-it editing environment. All text within a topic object must be tagged with a style object. This way your content will have a consistent and manageable look and feel.
The style object also contains a link to a style in a Microsoft Word template for the printed documentation, a definition for how the same style will be represented in the Windows Help, and a definition for a cascading style sheet (CSS) style in HTML.