https://techcrunch.com/2022/03/31/privacy-sandbox-global-trials/

Google has just announced the next stage of trials of its Privacy Sandbox proposal — focused on ads relevance and measurement.

The Sandbox refers to an evolving — and now very closely overseen — ad targeting tech stack which Google has proposed for replacing tracking cookie based targeted advertising in Chrome by (at the earliest) the second half of 2023 with alternatives which it argues will be better for users’ privacy yet still effective for generating ad revenue.