The Preface is optional and can be deleted if you decide not to use it.
Generally, it may contain personal details about the nature of the research undertaken, how it relates to your background and experiences, and information about the intended audience. Basically, information that is not directly relevant to the research itself. You may also include acknowledgments in this section. If you do include acknowledgments, then delete the Acknowledgments page.
Template users: It is best to wait until you have completely finalized your document before deleting this page, unless you are absolutely positive that you will not use it.