<http://schema.org/description>
"Half the ads on the internet are never seen by anybody, according to ComScore, a web traffic measurement company. And of those ads that are seen, it's not clear how many\u00A0are seen by human beings. Last year, the London-based start-up Spider.io, which\u00A0tracks ad fraud, revealed a network of 120,000 infected computers\u00A0(paywall) that together \"viewed\" ads..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/179653/why-googles-latest-acquisition-could-be-good-for-the-whole-online-ad-industry/>