“AdSense delivers relevant text and image ads that are precisely targeted to your site and your site content. And when you add a Google search box to your site, AdSense delivers relevant text ads that are targeted to the Google search results pages generated by your visitors’ search request.”
In short, AdSense is an additional source of revenue for your web site. You can add AdSense to a web site you currently own. You can also create a web site specifically designed to attract AdSense revenue. Keep in mind that this program is run by Google, so is not a fly-by-night get-rich-quick scheme. You will not get rich overnight from the AdSense revenue from a solitary site, no matter how well designed it might be. You can however, earn a decent income by creating a number of sites that each earns a little bit of AdSense revenue.
The rest of the article can be found at The Great Ideazine