puffery       
noun [ U ] mainly US uk/ˈpʌf.ər.i/ us/ˈpʌf.ɚ.i/
 吹嘘,吹捧,浮夸
the act of praising someone or something too much in a way that is not sincere
  It's usually easy to tell the difference between sales puffery and fact.  通常情况下,很容易分辨营销时的夸张和事实之间的区别。 
 His book avoids academic puffery and offers real insight. 他的书避免了学术浮夸,颇有真知灼见。 
 - More examples
 - Advertisers use a great deal of puffery.
 - Statements made in an explicitly joking manner are not puffery.
 - Puffery does not affect the buying behaviour of consumers.