Any idea how to solve sub domain tracking using GTMv2?

[Jenifer30]

my traffic goes to referral if visitors visits in my subdomain page. i have tried adding my subdomain in referral exclusion list and other ways via GTM posted in some articles, nothing seems to be working for me. any suggestions how to solve this issue

[LynnPatchett]

Hi,

This article gives a pretty good rundown of the steps needed (well the intro bit and then straight to step 4). Look out for the cookieDomain: auto setting which is a bit of a gotcha in many cases. Technical reasons behind the cookie domain issue can be found here. Hope it helps!