The description of the book is something you can use to make notes about the book. Maybe what it's about, what you have edited and what you still want to change. However, the description is not printed in the book. If you want to add a description of your book, or a personal text, you can choose to add a personal quote during the checkout.
To add or change the description, click the 
button in the upper, left-hand corner and you will find yourself on the editing page. Click on the pencil icon next to "What's your book about?" and add your notes! Click "Save" below the note when you are done. 
If you have any questions, please don't hesitate to contact us!