The phrase "to read the blurb" means to quickly look at a brief description or summary of something, such as a book or a movie, to get an idea of what it's about before deciding if you're interested in it. Full definition
Then hand them a postcard with part of your blurb on it (or your book so they can read the blurb on the back). (insecurewriterssupportgroup.com)
Obviously whoever picked out the stock photography either didn't get the blurb, didn't read the blurb, or couldn't have possibly cared less about truth in advertising. (rmfw.org)
Saying that something will be ready in 30 seconds is pretty incredible, as you might spend that much time just reading this blurb about the recipe. (paleogrubs.com)