Google is changing its AdWords display url policy starting in April 2008. With this change your ad's display URL must match its destination URL (the URL of your landing page).

For example, the following would be acceptable:

* Display URL: www.google.com/adwords
* Destination URL: www.trackingurl.com/google123
* Landing page URL: www.google.com

However, this example would be unacceptable:

* Display URL: www.google.com/adwords
* Destination URL: www.trackingurl.com/google123
* Landing page URL: www.trackingurl.com