AdWords Data in Analytics (not set) since 22 June
Hey there people,
From the 22th of june all our AdWords Campaigns on all out websites appear as (not set). The accounts are correctly linked and auto tagging is on. There were no changes on site or in our AdWords or Analytics.
What can it be?
"Not Set" is a data which could not be collected by Google for some reason.
Please go through this article to understand what exactly "Not set" means:
Hope it helps.
We figured it thanks!
IT implemented a change on server rewrites as suggested by our SEO lead.
This was the problem and fix:
URL case conversion
If the autotagging gclid value case is being altered by a URL rewrite engine on your server (like if gclid=TeSter is being changed to all lower cases gclid=tester), Google Analytics can't determine which the AdWords click is associated with the session. If any gclid parameter exists, the data is identified as as coming from source=google and medium=cpc, but all other click-specific data such (like campaign, adgroup, keyword etc.) appears as (not set) in Analytics reports.
To resolve this issue, configure your web server to allow all non-reserved URL characters, including uppercase characters and symbols like '-' (hyphen) and '_' (underscore), since these may be utilized by AdWords in generating a unique gclid parameter for a click.