When self-publishing, it is vital your book is comparable to traditionally-published books.
Because the reader is looking for a professional product. They don’t want to find mistakes (grammar, spelling), and they don’t want to feel they are buying something that only one person may have worked on. A traditional book is professionally proofread, copy-edited, final edited, and formatted. It is then given a professional cover and printed properly.
As a self-publisher, you must appear to be a professional. Therefore, the front material of your book should look similar, and provide the same info, as a traditionally published book.
This article from BookBaby has great info on what that should be and what it should look like. Click here.