Check out this quote from the forums at Search Engine Watch
‘It seems that Google is researching into allowing Adsense publishers to block ads by keywords, categories, and/or concepts. Currently you can only block ads by specific URL. If they go through with this it could be a great improvement on narrowing down the specifics for targeting. Also you would not have to research your competition as much. Only problem I can see is that some companies who do not compete with you yet have those keywords listed in their inventory could be mistakenly dropped.’
Bloggers everywhere would be rejoicing if this came to fruition – they’d be able to block those ‘blogging ads’ that tend to come up when you least want them. One of the most common questions I get asked here at Pro Blogger is ‘how do I stop my niche topic blog getting ads about blogging when its about <<insert topic here>>>’
There are things you can do (like remove every mention of the word blog from the text (and code) on your blog as well as increase the keyword density of the words you’re targeting – however sometimes no matter what you do you just keep getting ‘blogging ads’. Perhaps this new system is a solution to this!
Read more about it at Google Looking Into Negative Ad Blocking By Keywords
Found via SEO Round Table