In addition to AdWords, on-line merchants now can utilize Google Base to drive more traffic to their websites. The service is free and can be used to upload products and services so they can supplement search results on Google.com. At this time there three methods of uploading your products/services to Google Base. You can do it manually uploading individual products. You may use bulk upload, and advanced web-masters can use Google Base data API. For more information read about this service at Inside AdWords.