Hi, I hope someone can help me, because I cant seem to figure this out…
I dont understand what to put in “Klaviyo user id” I know this what this user ID is, but how do I get it to be dynamic? I hope my question makes sense.
you don’t need to explicitly handle it unless you need to 
most cases that id will be picked up from a cookie that will be set by your web Klaviyo script and/or Active on Site event triggered om sgtm. The source of that is klaviyo id/email from the URL.
So i can just leave it blank?