Back in August, we announced plans to give publishers the ability to allow multiple Google-certified ad networks to compete for display ad space on your site. While this feature was initially available only to publishers located in North America and Europe, we're happy to announce that all publishers will now have access to these participating ad networks.
Allowing these ad networks to compete for your display ad space means that more ads will be eligible to appear on your pages, leading to potentially higher earnings in the long run. Our system will show the ads that will generate you the most profit, whether they're from these Google-certified ad networks or the AdWords program. As a reminder, all Google-certified ad networks are required to adhere to our standards for user privacy, ad quality, and speed. In addition, you can use the controls in your Ad Review Center to specify which ad networks can appear on your pages.