I was at a meeting with an agency earlier and we got talking about tracking conversions across multiple clients in unrelated categories. This could be useful for  a number of reasons, both to provide insight into the relationship between brands and also to enable targeting in future. Currently companies wanting to do this would need to either take a feed from DoubleClick or Atlas in order to use their user ids or actually share personal data between clients (which is unlikely to be possible for legal reasons). The new version of TagMan actually logs the global user id for all conversions, making such analysis easy.  Continue reading →