Kevin Newcomb looks at the not so widely known practice from Google.
Google has quietly been running geo-targeted contextual ads in RSS feeds for several months, but many advertisers, agencies, and analysts contacted by ClickZ were surprised to learn about the placements.
The targeting came to the attention of a New York City-based ClickZ editor when an ad for a nearby single-location spa showed up on an RSS feed for a blog about Apple Computers. The same ad was targeted to other editors in New York, but not to others outside the city. The ad did not seem to be contextually targeted, but entirely targeted by location.