We primarily pass the client side values to our backend services who use
them in the server side calls. This ensures our client side analytics
implementation uses the same values as Target. This can be done by
extracting ECID, AAM Blob and Location Hint from the AMCV cookie. I
don't know Pedro but he has written some great stuff about server side
as well that we found while doing our implementation. I think you'll
also find them
valuable:https://www.pedromonjo.com/2019/06/hybrid-ecid/https://www...