Hi @gauravd85673172, Depends on the type of profile merge rule you're
looking to implement. If you are looking to qualify customer IDs
alongside device IDs into segments, you'll want to make sure the ID sync
is in place to stitch those customer IDs and device IDs together.I would
recommend looking into our documentation for the Experience Cloud
Identity Service, or also known as the Visitor ID service for our
"setCustomerIDs"
method.https://docs.adobe.com/content/help/en/id-service/using/id-serv...