How do you actually earn from AdSense?

November 23, 2009 5:56am CST
I have no clue to how to make money from sites such as Triond which offer you to add AdSense to your posting articles - I have no idea how to make money through it by adding something - I guess you add banners or something to the site or something! Please help me as I have no clue what so ever!
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