Advertising medium that is usually a single, standard-size page printed on one or both sides with an advertising message also, Flyers are most often used in direct-mail advertising and as handbills given to customers by local retailers. In direct mail, they often accompany a formal letter to expand information in the letter. For the local retailer, flyers offer market coverage at low cost with little waste and good flexibility. However, flyers have a high throwaway rate.