I meant to write about this sooner, but I guess this post falls in the 'better late than never' category.
Back in August, JohnTP (the popular affiliate blogger and owner of DigitGeek) created and posted a video walkthrough of the various ad assets that are available through the Shopzilla Publisher Program.
If you're new to Publisher, you definitely won't want to miss this informative video. JohnTP clearly describes each asset type and makes recommendations on which ones to use.
As always, please contact your account manager if you have any questions about the different ad units or how to install them.