Ad Personalization After Google's Cookie Reversal: Legal and Practical Implications

Short summary

Google reversed course on killing third-party cookies in Chrome and dismantled most of the Privacy Sandbox, but the legal landscape around cookie-based targeting has become less forgiving. Safari and other browsers already block third-party cookies by default, and privacy statutes now impose obligations that browser settings never did. Lead generation and data brokerage businesses face the greatest enforcement risk and need a durable, defensible personalization posture that accounts for consent signals rather than relying on technical reprieves.

• •Google abandoned its cookie deprecation plan and retired most Privacy Sandbox APIs, leaving only partitioning, auth, and anti-fraud features
• •The cookie survived technically but the legal framework around consent and privacy has tightened significantly
• •Lead generation and data brokerage businesses face the highest enforcement risk and must build privacy-compliant personalization strategies

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