joined:Oct 29, 2012
keep Mobile Ad Density in mind. Not adsense specific, but ads in general. On a bigger site, I would do 1 ad at (or near) top and 1 at at bottom of content. And stick another one in middle of content. 750 words is pretty short. If you put two ads within content, you are likely to hit that 30% limit.
I am in the camp to max out your ads placement (while optimizing for view ability and user experience). I disagree that you will not be able to make more money by adding more ad units, I have always almost made more money by adding units that are likely to be seen by users. Test the thesis on your own sites. But keep in mind when you plaster too many ads on a small new sites, it has the potential to hurt future traffic / repeat users. So in that sense, I would remove footer ad personally in your shoes. I will NOT add the ad before your content. But I will add 1 unit within content and 1 after content. The side unit is whatevers, as it'll almost never been seen on a responsive setup, but I would keep it personally.
When ads on a mobile page take up more than 30% of the vertical height of the main content portion of the page, the result is a disruptive ad experience, regardless of whether these ads are text, video, or static images. This includes “sticky” ads and in-line ads.
The Better Ads Standard does not include video ads that appear before (“pre-roll”) or during (“mid-roll”) video content that is relevant to the content of the page itself.
Included in our interpretation:
The density calculation applies to the fully expanded article or content of a page.
The content portion of the page excludes site headers, footers, and any content recommendations (e.g., “related articles” sections).
Ads include either external content recommendations or mixed (i.e., internal and external) content recommendations. If a module links to a page on your own site, and the presence of the link is not paid for, then it is not included in the ad density calculation.
end of official language
The hard limit on ad units has been removed by adsense a while back. But I would personally avoid stacking ads, like two 300x250, two 160,x600 side by side.