Additionally, hundreds of thousands of Web sites show AdWords ads on their pages as part of the AdSense program, which pays Web site owners to show AdWords ads on their sites. (See Figure for an example.) Think of an online version of a newspaper or magazine, with ads next to the editorial content. The content of the page determines which ads are shown. On sites devoted to weightlifting, for example, Google shows ads for workout programs and musclebuilding supplements, rather than knitting and quilting supplies. Google lets you choose whether to show your ads on this Content network, or just stick to the search networks. Although anyone with a Web site can use the AdSense program, Google has a special relationship with some of the most popular content sites on the Web, including
? About: www.about.com
? business.com: www.business.com
? Food Network: www.foodnetwork.com
? HGTV: www.hgtv.com
? HowStuffWorks: www.howstuffworks.com
? InfoSpace: www.infospace.com
? Lycos: www.lycos.com
? The New York Times: www.nytimes.com
? Reed Business: www.reedbusiness.com
Gmail is Google’s Web mail service. It displays AdWords results to the right of the e-mail you receive. If you choose to syndicate your ads, your prospects who use Gmail may see them if the text of the e-mail is deemed relevant to your offer. For example, Figure shows an e-mail that I (almost) sent to the MacArthur Foundation, humbly explaining why I should receive one of their “genius grants.” To the right, you can see ads for small business grants, a Cow Ringtone, triggered by my mention of a self-esteem program for cows, and two resources for college grant-seeker

