[milkytron]

Correct me if I'm wrong, but I believe a product is something produced. They produce a search engine, they serve ads on the search engine. Advertisers produce the ads. The ads are a product other than googles unless it is a Google ad.

[theoh]

Advertising "slots" are google's product, just like physical billboard installations are a product of ClearChannel etc. AdWords is the mechanism Google uses to sell this product.