Additional safeguards to protect the quality of our ad network

Supporting a healthy ads ecosystem that works for publishers, advertisers, and users continues to be a top priority in our effort to sustain a free and open web. As the ecosystem evolves, our ad systems and defenses must adapt as well. Today, we’d like to highlight some of our efforts to protect the quality of our ad network, and the benefits to our publishers and the advertising ecosystem. 

Last year, we introduced a site verification process in AdSense to provide additional safeguards before a publisher can serve ads. This feature allows us to provide more direct feedback to our publishers on the eligibility of their site, while allowing us to communicate issues sooner and lessen the likelihood of future violations. As an added benefit, confirming which websites a publisher intends to monetize allows us to reduce potential misuse of a publisher's ad code, such as when a bad actor tries to claim a website as their own, or when they use a legitimate publisher's ad code to serve ads on bad content in an attempt to demonetize the good website — each day, we now block more than 120 million ad requests with this feature. 

This year, we’re enhancing our defenses even more by improving the systems that identify potentially invalid traffic or high risk activities before ads are served. These defenses allow us to limit ad serving as needed to further protect our advertisers and users, while maximizing revenue opportunities for legitimate publishers. While most publishers will not notice any changes to their ad traffic, we are working on improving the experience for those that may be impacted, by providing more transparency around these actions. Publishers on AdSense and AdMob that are affected will soon be notified of these ad traffic restrictions directly in their Policy Center. This will allow them to understand why they may be experiencing reduced ad serving, and what steps they can take to resolve any issues and continue partnering with us.

We’re excited for what’s to come, and will continue to roll out improvements to these systems with all of our users in mind. Look out for future updates on our ongoing efforts to promote and sustain a healthy ads ecosystem.