An astroturf campaign can be defined as a “grassroots effort” that is actually a strategic marketing campaign financially backed by businesses and special-interest groups. It is a false front being paid for by someone with “deep pockets” and an agenda. The name “astroturf” is taken from the brand of false grass used in sports stadiums.
A Political Action Committee (PAC) is a committee that campaigns for or against a political candidate or legislation. In 1971, the Federal Election Campaign Act went into effect, prohibiting corporations and labor unions from contributing money from their treasuries to a political campaign. Under this act, they were also forbidden to provide any “in-kind” services to any candidate. A PAC is considered a separate unit of a corporation with its own treasury, so any individual wishing to contribute is permitted to.
Lobbying, PACs, grassroots movements, and astroturfing are closely related