Outdoor advertising is also called Out-of-home advertising or OOH advertising. Outdoor advertising services includes Railway Boards, Railway Panels, Mobile Sign Truck, Bus Panel, Advertising Kiosks, Traffic Booth advertising, Vinyl and Toll Naka advertising. Billboard advertising is a traditional OOH advertising type. Hoarding advertising is the most popular of the outdoor advertising options. Traditional roadside billboards remain the predominant form of OOH advertising since last many years but in recent years there has been significant growth in digital OOH or digital billboards. Transit advertising is placed on anything which moves such as buses advertising, rickshaw advertising, canter advertising, Mobile Van Advertising, tricycle advertising or cycle advertising. Transit advertising also includes fixed static and electronic advertising at train station, bus stations and on the platforms. Airport advertising helps businesses address an audience while traveling. Outdoor Media or Out-of-home media is also called as Out-of-home advertising or OOH media. Out-of-home media is advertising that reaches the consumers while they are outside their homes. Out-of-home advertising is primarily focused on marketing to consumers when they are on the go in public places, in transit, waiting when they are in specific commercial locations. Cycle advertising or tricycle advertising is a new type of mobile advertising in which a cycle tows a hoarding with an advertising message. This method is a cost-efficient, targeted, and environmentally friendly form of advertising. There are many other types of outdoor advertising which include airport displays, bus shelter displays or bus stop advertising, double-sided panels and mall displays.