Focus is the reason that search advertising is so wildly successful. If you’re looking to sell Budweiser, what better way is there to reach customers than to show your ads to the guy who goes to Google and types in “beer”? You know every single one of them wants to know something about beer.
http://reddit.com/info/verc/comments/
http://www.google.com/search?hl=en&q=beer+&btnG=Goog...
Great examples! Could be worse:
http://www.flickr.com/photos/merlin/sets/1207345/