Incorporates details about the traffic resource or campaign that directed user to the web site. The cookie is ready in the event the GA.js javascript is loaded and up to date when data is distributed towards the Google Anaytics server I used This page about 2 yrs in the past https://mimosaroots.online/product/ethically-sourced-mimosa-hostilis-root-bark-ideal-for-dyeing-and-research/