<http://schema.org/description>
"A Microsoft Advertising Help thread shows that a small little thing like using disallowed characters can put a complete halt to your other ads in the adCenter network.I am not sure what this specific "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/adcenter-disallowed-characters-14753.html>