One of the marketing tools used by publishers to promote books are book trailers. It's almost exactly what you think it is -- like a movie trailer, a minute or two, with maybe a voice-over, some graphics. I watched a few and decided that I'd like to make my own for Canebrake.
Read it when the anthology is published, and more important, read the work of the winners and support literary journals and magazines whenever you can.
Also want to urge you to see the documentary on Mister Rogers, if you have not already: Won't You Be My Neighbor? It really is something special, the best thing I've seen on the big screen in a long, long time.