SEO Internet Marketing

Google's AdSense program gives you the option to choose between a couple of different ad formats. Two main groups are text ads vs text & image ads. When you choose the latter, Google will deliver what they deem works best for your content (or so one would hope, and it would be in Google's best self-interest to serve you the best possible ad, it seems).

However, Google doesn't really know your layout preferences, and they don't really understand when your audience thinks ads are "too much"; and considering image ads include Flash animations (which you can't disable, once you go for image ads), Flash animations may well push some people away. One thing you can do is to only show image ads in areas where they don't disturb the content, e.g. at the end of posts. Also, you might want to listen to visitor feedback on the ads being served; I received emails before that the blinking ad on this or that site made a person want to leave the site, at which point I blocked the specific advertiser via the AdSense Setup -> Competitive Ad Filter option.