I am helping a friend who runs an auto body repair shop in a fairly major U.S. city Because it's such a large city, I wanted to limit ads being shown to around 3 miles of his shop, so I add the only the zip codes for the area. In total, Google's data is telling me there are about 75,000 people in these zip codes which sounds about right. I've had the ads live 2 days now and no clicks and impressions like 5 a day. I'm into top positions and there do not appear to be any ad or landing page issues. So that has me thinking something is odd on Google's side. Has anyone run zip code specific campaigns before which resulted in surprisingly low impressions?