"One more tip: Many publishers feel that they should run only ads that directly relate to the content of their sites. This is the idea behind Google's AdSense content banners. If you think about other advertising venues, such as magazines, however, you will see that they almost always offer ads from a variety of verticals. While a visitor may come to your site for its unique content, that does not mean he or she will not be interested in advertising for unrelated products and services.