Therefore, in order to reconcile a device browsing two different websites or in order to exchange information between providers, third-party cookies with third-party identifiers must be used.</p> <p> </p> <p>mediarithmics ensures a matching of third-party identifiers for a given device and offers it as a service, allowing to reconcile a device browsing websites on different domains and expose it to targeted ads. </p> <p> </p> <p> <strong>