Traditionally, programmatic advertising has relied heavily on behavioral targeting, using cookies and personal data to deliver ads tailored to user interests. However, GDPR compliance and browser changes have made this approach increasingly untenable.
A significant portion of users are either not accepting cookies or are using devices and browsers that limit tracking capabilities.
According to Ruler Analytics, the average cookie consent rate is 31% (but ranges from 4% to 85%). This is consistent with the findings of
a 2023 Pew Research Center study that surveyed 5,101 US adults and found that 67% of social media users turn off cookies or website tracking to protect their privacy.
Additionally, browsers like Safari and Firefox block third-party cookies.
According to StatCounter, as of March 2025, the market share of browsers that limit tracking is about 23% (28% if we include Edge, which partially limits third party cookies).
This means that publishers are left with reduced behavioral targeting accuracy, potential revenue declines, and heightened legal risks.