Google TextAd implementation - self-service, CPC (Cost Per Click)
Origins with Bill Gross' Go To Com company.
- from 2000 to 2002 (when AdWords launched), Google has TextAd-s but sold in the traditional way, and priced on CPM
May'2008: a brief history
sold via Search Term-based Auction on CPC basis (raising Click Fraud issues)
list of highest-paying words (notes prices are in $Can)
as a WebSite operator, to run AdWords on your site and make money, you use their AdSense service.