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What are link units?
Link units are a new form of text advertising that we're offering to our AdSense publishers. Using the same contextual targeting algorithm that targets Google ads to your content pages, link units display a list of topics that are relevant to your page. Each topic, when clicked, brings the user to a page of related advertisements.
The result is advertisements that are closely targeted to the interests of your users. By selecting the topics through interaction with the ad unit, users are presented with useful information in the form of related advertisements. Their direct involvement with the evolution of the ad unit guarantees an interest in the ads that are presented.
