Blurb

a brief advertisement or announcement, especially a laudatory one:
She wrote a good blurb for her friend’s novel.
to advertise or praise in the manner of a blurb.
Contemporary Examples

The Best of Brit Lit Peter Stothard November 3, 2009
Hipster Novelist Gary Shteyngart on Mentoring James Franco Gregory Gilderman, The Daily Beast Video July 22, 2010
Time to Grow Up, Lena Dunham Emily Shire October 9, 2014
Atheism’s Soulful Philosopher John Douglas Marshall February 1, 2010
My Dishy Phone Calls With Dominick Dunne Jane Hitchcock August 26, 2009
Who Was the Real Cato? David Frum December 19, 2012

Historical Examples

Assassin Jesse Franklin Bone
Kenny Leona Dalrymple
Freudian Slip Franklin Abel
Storm Over Warlock Andre Norton

noun
a promotional description, as found on the jackets of books
noun
n.

Gelett Burgess, whose recent little book, “Are You a Bromide?” has been referred to above, then entertained the guests with some characteristic flashes of Burgessian humor. Referring to the word “blurb” on the wrapper of his book he said: “To ‘blurb’ is to make a sound like a publisher. The blurb was invented by Frank A. Munsey when he wrote on the front of his magazine in red ink ‘I consider this number of Munsey’s the hottest pie that ever came out of my bakery.’ … A blurb is a check drawn on Fame, and it is seldom honored.[“] [“Publishers’ Weekly,” May 18, 1907]