Outdoor advertising or Out of Home Media comprises three main sectors: roadside, transport and ambient. It is worth around £900 million per year, which equates to nearly 10% of the total UK display advertising media spend. It is a vibrant media market, enjoying consistent growth since the 1980's that has outperformed all other media.

Out of Home Media exists wherever people travel, live, work or congregate. It is all around us and unavoidable. Out of Home Media exists in a whole range of environments; roads, shopping malls, airports, cinemas, railway stations, busses and trains. It uses a range of platforms, ranging from large and small format billboards to digital screens and floor graphics.

It is the most complex of the advertising media. The sector comprises over 500,000 different outdoor media opportunities situated throughout the UK; each platform representing a different value to the advertiser dependant on criteria such as format, presentation, location, environment, competition and a host of other factors.