We’re writing to let you know about an upcoming update in your AdSense account designed to help you generate the maximum revenue from your ad units. You’ll soon be able to allow multiple ad networks to show on your pages, which means that advertisers from external Google-certified networks will be able to compete with AdWords advertisers for your ad space.
If you’re unfamiliar with what ad networks are, they’re companies that partner with advertisers and publishers to buy and sell ads on sites they don’t own themselves, similar to AdSense. Ads from these networks will compete with Google ads to show on publisher sites, and the ad generating the highest revenue for publishers will be displayed.

