<http://schema.org/description>
"On day two of a new SEO term, we have Google Vibration Effect.This one comes with no explanation. A DigitalPoint Forums thread just has one webmaster stating someone told him his site suffers from it."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-vibration-14153.html>