Product placement (PPL) is a promotional tactic used by marketers in which a real commercial product is used in fictional or non-fictional media, and the presence of the product is a result of an economic exchange. When featuring a product is not part of an economic exchange, it is called a product plug. Product placement appears in plays, film, television series, music videos, video games and books, and is a relatively new idea (first appearing in the 1980's). Product placement occurs with the inclusion of a brand's logo, or a favorable mention or appearance of a product. This is done without disclosure, and under the premise that it is a natural part of the work. Most major movie releases today contain product placements. The most common form is movie and television placements and more recently video games.