Amazon offers four basic ways to advertise products. However, KDP account holders are limited to using just one of them: Sponsored Product Ads.

These ads appear in search results on product pages. They are cost-per-click ads .

After signing in to your KDP Bookshelf, click on Promote and Advertise next to your book’s title. 

You will be given step-by-step directions to write a short “ad” and select how much you are willing to pay each time a prospective buyer clicks on your ad. (Note: This is not per sale. It is per click.)

You will also need to set a max budget for your ad. Once your budget is used, your ad will not show. 

You can renew or rewrite your ad as often as you want.