Here is a very basic list of actions all current Google Product Search merchants will need to take in order to continue listing on Google after the transition:
- Open a Google AdWords account if you don't already have one
- Link the AdWords account with your Google Merchant Center account
- Create Product Listing Ads or Product Extensions in your AdWords account
You have until October 2012 to try out Google's Product Ads formats. Until that time your current Product Search listings will remain active. After the full transition in October only your Product Ads will be shown (there will be no more free Product Search listings).