A brochure is a promotional document primarily used to introduce a company, organization, products, or services and inform prospective customers or members of the public of the benefits. Although, initially, a paper document that can be folded into a template, pamphlet, or leaflet, a brochure can also be a set of related unfolded papers put into a pocket folder or packet or can be in digital format. A brochure is a corporate marketing instrument to promote a product or service. It is a tool used to circulate information about the product or service. A brochure is like a magazine but with pictures of the product or the service which the brand is promoting. Depending on various aspects there are different types of brochures: Gate Fold Brochures, Trifold Brochures, and Z-Fold Brochures. Brochures are distributed in many ways: as newspaper inserts, handed out personally, by mail, or placed in brochure racks in high-traffic locations, especially in tourist precincts. They may be considered grey literature. A brochure is usually folded and only includes promotional summary information. A brochure is usually folded and only includes promotional summary information. A booklet is typically several sheets of paper with a card stock cover and bound with staples, string, or plastic binding. In contrast, a single piece of unfolded paper is usually called an insert, flyer, or bulletin. Brochures available in electronic format are called e-brochures. This format has the added benefit of unlimited distribution and cost savings compared to traditional paper brochures. The most common types of single-sheet brochures are the bi-fold (a single sheet printed on both sides and folded into halves) and the tri-fold (the same, but folded into thirds). A bi-fold brochure results in four panels (two panels on each side), while a tri-fold results in six panels (three panels on each side). Other brochure fold arrangements are possible: the accordion or "z-fold" method, the "c-fold" method, etc.