<http://schema.org/description>
"A WebmasterWorld member asks what value Google AdWords has for the potential advertiser.  Do you actually use AdSense and buy products, do you click on the ad and do nothing, or do you ignore the ad a"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/014721.html>