Using Googles Adsense program you can easily place Advertising on your website / blog
and generate income from your sites natural traffic
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To maximize the revenue generated from your site, you'll need to place the ads in areas where your visitors are likely to click. That said, you don't want your site to appear spammy and prevent people from locating the quality content -- otherwise your visitors will just hit the back button.
Google has created a "heatmap" which shows where people are most likely to click on advertising (the darker the shade of orange, the more clicks that area should receive):
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