3) Too Many Ads?
If you’ve got your site loaded up with advertising in your header, footer, and in your sidebars, it’s likely that’s too much. While Google’s AdSense team advises using lots of advertising, the search team feels differently.
In this blog post, blogger Andrew Hansen shares a note from Google that outlines a 1:1 ratio for unique content to ads. So if 25 percent of your content is ads, you need to have at least 25 percent original content on that page. If your site has 75 percent of its content as display ads, then you’ll need to boost the amount of content on that page and add additional original content to get to a 1:1 ratio.