Google AdSense Changing First-Party Cookie Controls
Briefly

Google is making changes to first-party cookie management in AdSense to simplify controls and improve access to third-party demand.
The new control for first-party cookies encompasses both general usage and personalization, facilitating easier management for publishers.
Starting December 4th, 2024, first-party cookies will be shared with Authorized Buyers, except for users in certain regions.
Allowing first-party cookies can increase revenue by enabling features like frequency capping and personalization during the absence of third-party cookies.
Read at Search Engine Roundtable
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