On my site when viewed in Internet Explorer, my ad's do not show or they do not show relevent ad's. When viewed in Firefox, they are relevant and they actually show.
Does anyone have any information regarding this problem?
A good way to target the Adsense ads has more to do with content than the code of your site. When writing a post consider repeating a word that you want Adsense to pick up on. For example if your are running a blog about global warming, you will want to use the phrase "global warming" quite often. This technique, known as keyword density, also increases the likelihood your blog will a higher rating on search engines.
Yes. I think I have done a good job with that. However, in my header, I have a advertisement, but it's never showing anything. I don't think I will ever get that to display anything relevant since it's just the header with no information. Any other ideas on that issue?