@Skeeec Sure.
If your site has an active split test, as a user hits our ADN, the ADN will set a cookie in the client called nf_ab which has a random number between 0 & 1. This cookie will tell our ADN how send traffic between the branches in the A/B test.
Also:
https://www.youtube.com/watch?v=Q5-QTaAOSrY&feature=youtu.be&t=180
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You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.