Publishers on Publicity

Sure, we hear all the time about what authors can do to promote their books. But just what do the official publicity/marketing people at the publishers do for your book?

Anna, who once was an editor at Tor, wrote about the ad/promo department totally owns you. She also wrote on a related point, do large advances mean more publicity?

John Scalzi wrote on Sympathy for the Publicist.

J. A. Konrath wrote about The Truth About Publishers, David Morrell on Book Marketing and Publicity, and David Morrell Part Deux: The Publicist Speaks.