The Character Style to Face Markup Conversion section of Cleanup covers two types of character styles.
Cleanup Function
Use
Built-in Styles
When selected, Word’s built-in character styles are converted to face markup. Word’s built-in character styles include: strong, emphasis, hyperlink, etc. This option removes the character style (which can interfere with proper XML export) but retains the bold, italic, underline local formatting, which you want to retain.
User-Defined Styles
When selected, this option converts any user-defined character style to face markup.
User-defined character styles can include any character style that is not native to Word; e.g., character styles that might have been created and used in an authoring template or that the author herself may have created.
This conversion may exclude the Word character styles for “Hyperlink,” “Footnote Reference,” “Endnote Reference,” and “Comment Reference,” depending on your configuration and whether your organization wants to retain those specific character styles.
Because non-eXtyles character styles can interfere with subsequent eXtyles processing, this conversion is most important for preparing the document for advanced processing functions.
What’s the difference between Paragraph Styles and Character Styles?
Short answer: Paragraph Styles are used to format and semantically identify each element of your manuscript at the paragraph level. While Character Styles apply uniquely identifying formatting to a word or phrase within the paragraph.