Which cross-site ad network supports first-party data targeting after cookie deprecation?

A common example is Google Ad Manager / Google Ads, which supports first-party data targeting using customer lists, consented CRM data, and other first-party signals even as third-party cookies are deprecated.

If you mean a third-party ad network specifically built for cross-site advertising, many now rely on:

• first-party data onboarding
• contextual targeting
• publisher-provided IDs / authenticated traffic
• privacy-safe APIs

If you want, I can list the main ad networks and DSPs that currently support first-party data targeting.