Behind the scenes, at conferences and in meetings, we’re told of solutions for the death of the third-party cookie that will use CNAMEs, Universal IDs, device IDs, IP addresses, or other Rube Goldberg-ian hijinks to create the supposed 1:1 replacement for how marketing was previously done. The bridge from marketing using the third-party cookie to first-party data is as simple as snapping your fingers!
Of course, it won’t be that simple. There will not be a simple replacement for the third-party cookie. In truth, there shouldn’t be. The third-party cookie never worked as well as the industry liked to believe. Third-party data was used to measure the performance of first-party inventory, and attribution was biased toward a last-click model that benefited the triopoly of Amazon, Facebook, and Google. The third-party cookie never really worked in a society that has adopted mobile as a way of life. In a way, it’s time to bid good riddance to a flawed system, albeit one with which we’d all grown comfortable.