It only works if you have identified (logged-in) traffic and pass the identifier (ie, email hash) along to the side-channel.
Otherwise there's no way to target the ads, it's a first-party cookie but scoped to a single domain so there's no useful targeting data.
(and yes, this is the industry plan, but it's TBD whether publishers like media websites can get a workable fraction of their users to log themselves in)
Otherwise there's no way to target the ads, it's a first-party cookie but scoped to a single domain so there's no useful targeting data.
(and yes, this is the industry plan, but it's TBD whether publishers like media websites can get a workable fraction of their users to log themselves in)