A brochure is a type of leaflet which contains marketing information about products and/or services for sale. They could also be informative, as is the case with brochures for many non-profit or government institutions, informing people about policies, AIDS, TB, elections, etc.
Brochures come in many shapes and sizes. Deciding which way to go really depends on the product, service or information being presented by the brochure. Are they going to be quick give-aways at a tourist-kiosk, hardware store or street corner? If this is the case, it is unwise to use thick, costly paper stock and expensive printing processes or techniques. But if you are an upmarket guesthouse, a hotel or maybe sell really expensive items, your brochure needs to look the part, and foiling, die-cutting, embossing, varnishing or fancy papers might apply.
Booklets are generally created when there is too much information for a brochure, but not enough for a catalogue. The neccessary amount of pages are added, and the booklet is saddle stitched (“stapled”). Depending on the content, booklets can be full colour throughout, or they can be produced with colour cover only, the contents being black and white. The latter is of course a more economical option and can be used if the contents is mostly text or graphs, but will in most cases not do justice to product or other images.