Blurb (noun)

1. A short description of a book, film, or other product, typically found on the cover or in advertising, meant to entice potential buyers or readers.
2. A piece of publicity or promotional material.

Origin:

The word blurb is thought to have originated in 1907, it was coined by the american humorist gelett burgess in his book "are you a bromide?". it is a combination of bluster and burble, which refers to the promotional descriptions on book covers. .

Examples:

1. The blurb on the back of the book promises a thrilling mystery.
2. I usually read the blurb before deciding to buy a book.
3. The blurb on the movie poster made it sound like a great comedy.
4. The blurb said the new restaurant was the best in town.
5. The blurb was written by the author himself, describing the novel in the most captivating way possible.