When creating a pay-per-click ad (PPC) ad, it is easy to overlook the importance of the display URL. However, search engine marketers have only a limited number of lines of text to work with and should take maximum advantage of each of them. This article summarizes the results of an eye tracking study and reviews the findings of two other tests of display URLs. The eye tracking study demonstrated that the display URL in PPC ads captures a significant portion of the gaze time allocated to the ads. The results of the other two tests showed that display URLs can have a meaningful impact upon click-thru rates.