You know that Google owns the Adsense network. But what you may not be knowing is that Google has started a secret ad network - Google Display Advertising Network. Apparently, the network allows publishers negotiate their own CPM (cost per thousand impressions) with Google.

John Chow reported: "The Google Display Advertising Network was created so Google can go after Fortune 1000 companies, which buy advertising to build a brand more than to sell a product. Google already dominates text and CPC ads so going after display and video ads is the next logical step. Google offers display and video ads to AdSense publishers on CPC and CPM format already. However, the formation of the Display Advertising Network is a clear signal that Google really want to push this forward.

How do you join the Google Display Advertising Network? You can’t. Google won’t even acknowledge it exists. You won’t find anything written about it in any of Google’s web properties. The only way to get into the display network is if Google invites you, which is how I found out about it."

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