When a new ad is created, you are asked to select a category of site on which the ad will be shown. It would be very helpful if the category of existing ads could be shown in the ad management page. This would be especially useful if someone wanted to use the same ad title and text (or the same banner and alt text) in more than one category of site.
That would be a good idea for the future when theme ads are implemented. For now though, ads are shown on all pages, not just specific categories. good suggestion