From https://web.dev/floc/ https://web.dev/floc/ in section "Do websites have to participate and share information?" > For pages that haven't been excluded, a

From https://web.dev/floc/ https://web.dev/floc/ in section "Do websites have to participate and share information?" > For pages that haven't been excluded, a page visit will be included in the browser's FLoC calculation if document.interestCohort() is used on the page. > During the current FLoC origin trial, a page will also be included in the calculation if Chrome detects that the page loads ads or ads-related resources.