Outdoor Advertising
Outdoor advertising 
is essentially any type of advertising that reaches the consumer while he or she is outside the home. This is in contrast with broadcast, print, and Internet advertising.
Out of home advertising, therefore, is focused on marketing to consumers when they are "on the go" in public places, in transit, waiting (such as in a medical office), and/or in specific commercial locations (such as in a retail venue).
Billboard advertising is a traditional out of home advertising format, but there has been significant growth in mobile out of home advertising (billboards and place-based formats) in recent years. And we primarily focus on these formats viz., billboards and mobile displays.