2018-12-11 UTC
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petermolnar there are different types of ad networks, however, most of them are not as automated as many believe, even google has a system, where you specify target audience, and this is done by people. Classifying the target audience is most probably automated in Google's case, but not in DuckDuckGo's case: they have blog posts out there that advertisers buy target phrases, words, sentences, and they are shown according to that...