> how are ad companies supposed to actually target their audience with it if there is no translation between cohorts and target groups? Even as an opaque ident

> how are ad companies supposed to actually target their audience with it if there is no translation between cohorts and target groups? Even as an opaque identifier it's still useful. Imagine you run a store and you log the FLoC cohorts of your customers. You could then target ads at the most common cohorts you've seen as a way to say "show my ads to more people similar to my existing customers". (Disclosure: I work on ads at Google, speaking only for myself)