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YOUR RICH ON KEYWORDS CONTENT GOES HERE
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So ho do you use it? Lets pretend you have a post about "how to make money online" so what Adsense does it scans that post and then depending on the works it finds it will deliver ads that most of the time is not relevant to your post, so if your post is about "making money online" and the ad is about online dating then nobody will never click it. You need relevant ads to increase Adsense CTR. So find on your post section reach with your keywords and use the code above to mark it for Adsense. The next time Adsense comes it will use that section of text for displaying ads which will be relevant to your post and will increase CTR and Adsense CPC.