A short description of a book, film, etc., written by the people who have produced it, and intended to make people want to buy it or see it. (Cambridge Dictionary)
A short publicity notice (as on a book jacket). (Merriam – Webster)
The blurb about a new book, film, or exhibition is information about it that is written in order to attract people’s interest. (Collins Dictionary)
A short description of a book, film, or other product written for promotional purposes. (Oxford Dictionaries)
How to Write Your Company’s Blurb.
Writing Your Blurb or Bio: The Essential Points.
How To Write A Blurb in 6 Steps.
17 Tips on How To Write a Blurb That Sells.