Comment by mcint

FLoC stands for Federated Learning of Cohorts which aims to target advertising better without it directly relying on singularly personal information.

https://web.dev/floc/

  FLoC enables ad selection without sharing the browsing behaviour of individual users.

  FLoC provides a privacy-preserving mechanism for interest-based ad selection.

  As a user moves around the web, their browser uses the FLoC algorithm to work out its "interest cohort", which will be the same for thousands of browsers with a similar recent browsing history. The browser recalculates its cohort periodically, on the user's device, without sharing individual browsing data with the browser vendor or anyone else.

https://www.chromium.org/Home/chromium-privacy/privacy-sandb...