This is a new feature that Google is expanding gradually in order to make AdSense more ergonomic management advertisements. Until now
want to control when the ads displayed on its site, it could do so only after the fact. It should submit the page to test a battery of refreshments (F5) to view the ads as they passed. It was then noted advertisements deemed undesirable, search their web address and register in a section on "Ad Filter competition" designed to collect domain names banned from advertising.
The new feature introduced by Google list advertisers who have targeted (Placement targeting) your site. Then simply check the advertiser does not want is for him to prohibit the release of its ad group. It is also possible to prohibit publication of any advertiser. It is even possible to manage this section a priori, ie before the ad was published. This is the default choice "Dissemination immediately announce" that he must switch to "Hang 24 ads for consideration" which implies that you are very reactive, since failing to agree, the ads will appear 24 hours later.
The Ad Review Center is still shut for the targeting of ads by keyword, but Google is working on. As against these ads are filterable through the "filter ads from the competition."
I think I picked it up a bit since Google introduced it in 2008 and extended to all providers of content pages in May 2008. And it was only during the implementation of this feature for RSS feeds that I discovered its existence. At the same time, I'm still this post because I have not seen a lot of talk about blogs, even Abundance is a reference to me, there is that a vague reference late 2007 (before the release of function).
Resources Google ... :
Help Center Google Ad Review Center Control placement-targeted ads - Google Inside AdSense blog Control ad that you run - Inside AdSense Blog Google Ad Review Center for feeds - Google AdSense Blog Feeds For 
