A flyer (or flier) is a form of paper advertisement intended for wide distribution and typically posted or distributed in a public place, handed out to individuals or sent through the mail. In the 2010s, flyers range from inexpensively photocopied leaflets to expensive, glossy, full-color circulars.

Written content should be at a minimum, with well-chosen and well-structured sentences, headings and sub-headings impacting the information you want your leaflets and flyers to give your customers. But it needs to be laid out well and this means the right spacing, and clever use of 'white' or empty space.