It must present readers why they need to browse your book and let them know what they're able to anticipate; it’s an ad for that book. It is far from your own statement on why you wrote the book. (This typically goes on the inside book jacket flap for hardbacks.) https://selfpublishonamazon.family.blog/2024/09/28/how-are-book-awards-and-contests-beneficial-to-authors/