Identify the issue
The “Website redirects are losing click data” error appears when your redirects aren’t passing along your GCLIDs (Google Click Identifiers). When a user clicks on your ad, a GCLID is attached to the URL to help measure if the user converts. If the landing page redirects the user to another page but doesn't also pass along the GCLID, the user's click won't be associated with any future conversions.
Fix the issue
There is server-side code that is negatively affecting your measurement as a result of redirect behavior. You will need to identify what isn’t working properly on your server and have it fixed by your IT personnel so that the GCLID isn’t removed from the URL to allow the conversions to be tracked.
Show me an example
https://example.com/my-adWhen an end-user clicks on your ad, it would be turned into this URL:
https://example.com/my-ad?gclid=<the-value>
This URL then redirects the user to another page but strips the parameter:
https://example.com/my-ad?gclid=<the-value> redirects to https://example.com/another-page (note the missing GCLID)
This breaks the attribution for the ad click. In order to fix this, you or your IT personnel will need to change the server behavior to forward the GCLID to the new page like this:
https://example.com/another-page?gclid=<the-value>