<http://schema.org/description>
"Earlier this month, Google announced they will stop allowing AdWords ads from rotating beyond 30-days.  In the past, you were able to set your ads to rotate on based on \"optimize for clicks,\" \"optimiz"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-adwords-rotate-pause-15182.html>