Policy and restrictions

As of April 2008 Google AdWords no longer allows for the display URL to deviate from that of the destination URL. Prior to its introduction, Google paid advertisements could feature different landing page URLs to that of what was being displayed on the search network. Google expounds that the policy change stems from both user and advertiser feedback. The concern prompting the restriction change is believed to be the premise on which users clicked advertisements. Users were in some cases, being misled and further targeted by AdWords advertisers.

Google has other restrictions, for example the advertising of a book by Aaron Greenspan called Authoritas: One Student's Harvard Admissions and the Founding of the Facebook Era, was restricted from advertising on AdWords because it contained the word Facebook in it. Google's rationale was that it was prohibited from advertising a book which used a trademarked name in its title.