Google may be taking a closer look at AdSense placements dropped onto blogs created through its Blogger service.

Some people will do anything to make a buck. There are publishers who work hard on content, link structures, sitemaps, and ad unit placements on their sites.

Then you have the people who open a blog, plug in an AdSense unit as content, and walk away, possibly after buying some ads to point people to the blog and hope they click on an ad or two as they try and find the content.

On the Google AdSense blog, they discussed ad placement and what publishers should avoid. They humorously called this post “Another look at optimizations,” but it could have been titled, “You really aren’t this stupid, are you?”

In a nutshell, don’t have ads as the only content on a site, and don’t make them look like they are content when they really are ads.

Google has been on a quality score kick, to the lamentations of webmasters who saw their keyword bid prices skyrocket after Google deemed their ads to be of low quality. The quality buzz trickled down to AdSense, as it seems Google has taken a renewed interest in how partner sites on that network present its ads.

Or maybe Google found it had a lot of AdWords publishers blocking a number of individual sites with a common top level domain, like maybe blogspot.com. After all, Google isn’t the only entity in the AdWords equation worried about quality.

Reports by metrics firm comScore over the past two months suggest ad clicking is in decline. Google’s renewed dedication to quality could be to blame, as could economic conditions where people are not even bothering to browse online and click retail ads, much less buy anything.

Whatever the cause, Google wants to see AdSense partners optimize sites properly. A little content added to the mix would be helpful, and they may be checking up on that more frequently.