term:

Puffing

puffing n

: the practice of making exaggerated commendations esp. for promotional purposes
;also
: the exaggerated commendations made NOTE: Generally, a seller cannot be held liable for misrepresentation for statements that amount to mere puffing. Nor can puffing be considered to create an express warranty.

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.