We've been hearing your requests for new ways to generate revenue in AdSense, and new ways to maintain control over the ads that appear on your sites. With that in mind, we're pleased to announce plans to give you the ability to allow multiple Google-certified ad networks to compete for display ad space on your site.

You may remember that we began to accept display ads served from qualified third-party vendors over a year ago, which helped increase the number of display ads competing on AdSense publisher sites. With this new change, participating ad networks can also bid in our auction to appear on AdSense sites. This new capability will help you generate the most profit for every ad that appears on your site, whether the ads come from AdWords advertisers or Google-certified ad networks.

Who are these ad networks? They're ad agencies and companies that partner with advertisers and publishers to buy and sell ads on sites they don't own themselves (much like AdSense). You'll now be able to allow advertisers from these networks to compete with AdWords advertisers for your ad space. All reporting and payments will still run through AdSense as they always have, and the available ad formats will be the same as those offered for AdWords ads.

We take the quality of ads delivered to your site seriously, so we'll be certifying all participating ad networks for adherence to our standards for user privacy, ad quality, and speed. You'll have control over which networks can show ads on your pages -- you can choose to opt out of receiving ads from specific networks, or all networks completely. This means you can continue to show ads from only AdWords advertisers if you like. Visit the Help Center to learn more about managing these account settings.

We'll slowly begin allowing ads from Google-certified ad networks to appear on AdSense pages over the coming months, so you won't see an immediate impact on your ads or earnings. As new networks are certified, you'll see them appear in your account. This feature will initially be available to publishers in North America and Europe, but we hope to roll it out to additional parts of the world in the future.

Finally, some ad networks use tools similar to Google's interest-based advertising to show more relevant ads to users on the sites they visit. We'll allow certified networks who comply with user privacy guidelines to show ads using these tools, but they won't be permitted to collect data from your site for the purpose of subsequent interest-based advertising. You'll be able to opt out of receiving ads based on user interests from these certified networks, and we have changed our requirements for third-party ad serving to reflect this.

We're dedicated to providing users with a positive experience, while helping publishers effectively monetize the ads appearing on their sites. We believe you'll find that more competition translates into better ads and increased revenue in the long run.