I have customer who has a issue which he mailed me like this:
The Ad Destination URL http://www.domain.com/something/something from the AdWords account xx.xx has accrued a significant number of clicks but a lower-than-expected number of sessions from mobile clients because the page is dropping or altering the gclid parameter inserted by Google. Check the web server's redirect logic or its use of a URL rewrite engine to ensure the gclid parameter is preserved.
His domain is hosted in Windows IIS. I have searched for this similar issue and found a link here:
However I would like to know where in server side (IIS) I could start checking for this "web-server is stripping it off" ?
Any help or guide is appreciated.
Re: gclid parameter
If your using Duda Mobile, switching to this should make the gclid issue go away. Its the only site I have ever seen that issue and the self referral on so pretty sure it is specific to something Duda Mobile is doing.