This is the short description of the theme, characters, and plot that’s used to help entice a reader into potentially buying your book. Along with title and cover, the product description (also commonly referred to as “the blurb”) is one of the most important marketing tools at a writer’s disposal.
I highly recommend writers learn to write their own product descriptions, but for those writers who would like assistance, I can either offer revision suggestions, or I can write the entire product description for them.