Astroturfing

Astroturfing refers to political, advertising or public relations campaigns that are designed to mask the sponsors of the message to give the appearance of coming from a disinterested, grassroots participant. Astroturfing is intended to give the statements the credibility of an independent entity by withholding information about the source's financial connection. The term is a derivation of AstroTurf, a brand of synthetic carpeting designed to look like natural grass.