Puffery as a legal term refers to promotional statements and claims that express subjective rather than objective views, such that no reasonable person would take them literally. Puffery serves to "puff up" an exaggerated image of what is being described and is especially featured in testimonials.
Federal Trade Commission definition
The United States Federal Trade Commission (FTC) defined puffery as a "term frequently used to denote the exaggerations reasonably to be expected of a seller as to the degree of quality of his product, the truth or falsity of which cannot be precisely determined." 
The FTC stated in 1984 that puffery does not warrant enforcement action by the Commission. In its FTC Policy Statement on Deception, the Commission stated: "The Commission generally will not pursue cases involving obviously exaggerated or puffing representations, i.e., those that the ordinary consumers do not take seriously." e.g., "The Finest Fried Chicken in the World."
Puff piece or fluff piece is an idiom for a journalistic form of puffery; an article or story of exaggerating praise that often ignores or downplays opposing viewpoints or evidence to the contrary. In some cases, reviews of films, albums, or products (e.g., a new car or TV) may be considered to be "puff pieces", due to the actual or perceived bias of the reviewer: a review of a product, film, or event that is written by a sympathetic reviewer or by an individual who has a connection to the product or event in question, either in terms of an employment relationship or other links. For example, a major media conglomerate that owns both print media and record companies may instruct one of its employees in one of its newspapers to do a review of an album which is being released by the conglomerate's record company.
Although some journalists may assert their professional independence and integrity, and insist on producing an unbiased review, in other cases, a writer may succumb to the pressure and pen a biased "puff piece" which praises the product or event while omitting any discussion of any shortcomings. In some cases, "puff pieces" purport to provide a review of the product or event, but instead merely provide "peacock words" ("An amazing recording"); "weasel words" ("probably one of the most important albums of the 2000s") and tabloid-style filler which is peripheral or irrelevant to assessing the qualities of the product or event ("During the filming, there were rumours that romantic sparks flew between the two co-leads, who were often seen talking together on the set").
The financial relationship between the product company or entertainment firm and the reviewer is not always as obvious as a cash payment. In some cases, a small group of reviewers may be given an exclusive invitation to test-drive a new sports car or see a new film before it is released. This privileged access to the product may lead the reviewer to do a biased review, either out of a sense of obligation, or because of a concern that the failure to produce a "puff piece" will lead to the loss of the preview privilege in following years. In some cases, the potential for bias in invitation-only preview sessions is substantially heightened when the reviewers are flown in to the location for the review, given fancy hotel rooms, and provided catered food and drinks during the actual review. The most egregious cases of this situation occur when, instead of inviting the reviewers to the company headquarters or another logical venue, the company gives all-expense paid tickets to Hawaii or Mexico, and holds the preview screening of the film or the product launch there.
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- Newcal Industries, Inc. v. IKON Office Solutions, 513 F.3d 1038, 1053 (9th Cir. 2008).
- Better Living, Inc. et al., 54 F.T.C. 648 (1957), aff'd, 259 F.2d 271 (3rd Cir. 1958).
- ""puff piece." Answers.com". The American Heritage Dictionary of Idioms. Houghton Mifflin Company. 1992. http://www.answers.com/topic/puff-piece. Retrieved 2006-07-22.
- Boudreaux, Donald J. (1995). "Puffery" in Advertising. Free Market, September 1995 Volume 13, Number 9.
- Preston, Ivan L. (1996). The Great American Blow-Up: Puffery in Advertising and Selling. University of Wisconsin Press. ISBN 0-299-15254-5
- Foulke, Judith E. (1995) Cosmetic Ingredients: Understanding the Puffery. FDA Consumer, Publication No. (FDA) 95-5013.
- Hoffman, David A. (2006). The Best Puffery Article Ever. Iowa Law Review, Vol. 91, 2006
- DeFrancis, Victor F. (2004). Template:PDF. FTC Consumer Protection Update, Fall 2004.
- Federal Trade Commission Policy Statement on Deception, 103 F.T.C. 174 (1984), appended to Cliffdale Assoc. Inc., 103 F.T.C. 110 (1984).