Advertise an event such as a music concert, nightclub appearance, festival, or political rally Promote a goods-selling businesses such as a used car lot discount store or a service business such as a restaurant or massage parlour. Persuade people about a social, religious, or political message, as in evangelism or political campaign activities on behalf of a political party or candidate during an election. Flyers have been used in armed conflict: for example, airborne leaflet propaganda has been a tactic of psychological warfare.