A Blurb might be painful and I think every author would prefer she could skip the blurb and just get the agent, editor and reader to read her writing. But that blurb is the only way you’re going to get people to read your writing. It’s not just agents who need the blurb. It’s editors, and it’s readers.
Short and Sweet on Queries
Before a reader will even consider opening the book to read the writing they are going to read the back cover blurb. Often the back cover blurb is taking directly from the author’s initial query.