I am having trouble tracking source/medium of traffic that comes from readers clicking the URL links from within a PDF newsletter. I use Campaign URL Builder to build the custom URL containing the parameters, and here's a sample link I inserted in my PDF:
https://example.com/?utm_source=newsletter&utm_medium=pdf&utm_campaign=launch
In my Google Analytics report (GA4), the traffic from that click will just show up as "direct" or "none" when I look at the session source/medium/campaign. I want to be able to track that it's from "newsletter" (source), "pdf" (medium), and "launch" (campaign)
How can I track that? Any idea if this is possible?