a promotional statement (as found on the dust jackets of books)
"the author got all his friends to write blurbs for his book"
A short description of a book, film, or other work, written and used for promotional purposes.
"The marketing team spent all morning crafting a catchy blurb to attract readers before the novel's release date."
To write or quote in a blurb.
"The author was paid to write a glowing blurb for his new book's back cover."