Google’s programmatic ad product, called Google Ads, is the largest exchange and made $168 billion in advertising revenue last year. The company has come under criticism for serving ads on content farms in the past, even though its own policies prohibit sites from placing Google-served ads on pages with “spammy automatically generated content.” Around a quarter of the sites flagged by NewsGuard featured programmatic ads from major brands. Of the 393 ads from big brands found on AI-generated sites, 356 were served by Google.

“We have strict policies that govern the type of content that can monetize on our platform,” Michael Aciman, a policy communications manager for Google, told MIT Technology Review in an email. “For example, we don’t allow ads to run alongside harmful content, spammy or low-value content, or content that’s been solely copied from other sites. When enforcing these policies, we focus on the quality of