If you are new to Google adwords and wants to learn how exactly it works internally i.e. how google decides which ad to show, where to show and how much exactly does the advertisers have to pay, you should look at Google’s Youtube Google Business Channel which has some excellent videos.

Specially watch this video to understand the bidding system of adwords and how adwords works

The channel has about 25 videos and I will highly advice you to watch all of them as this will help you to understand both adsense and adwords models specially if you are looking to use PPC to drive traffic to your website.

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