As Karl Marx said, "Being determines consciousness," meaning, in part, that the way you make your living influences how you think about things. Google makes its living from advertising, and the Google AdSense program in particular earns its keep by placing ads in web content. It's therefore not surprising to see AdSense promoting itself as the way to reap "the reward of great content"; of course, you should remember what else determines great content from Chapter 1.
This chapter explains the details of how to work with the Google AdSense program. Once you know how to work with AdSense, you can start making money from your web sites by placing Google's ad code in your web pages.