Puffery is undue or exaggerated praise. Puffery serves to "puff up" what is being described. In law, puffery is usually invoked as a defense argument: it identifies general praising speech, typically produced by a seller, which is not expected to be relied upon and does not give rise to legal liability. In a circular manner, legal explanations for this normative position describe the non-enforceable speech as a statement that no "reasonable person" would take seriously.