What is google adsense and how it works?

@ml2blog (414)
United States
May 28, 2008 11:15am CST
I have been heard google adsense over and over again from others and online. But I still don't get what the google adsense is and how it works. In my little knowledge about google adsense, google adsense pays you every time ad clicks by people. But I don't know if we must have a own website or not, in order to enroll to it. Is google adsense require to have a own website for approving? Is google adsense really earn money?
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