Outdoor advertising, also known as out-of-home (OOH) advertising, is the use of billboards, transit advertising, and other forms of advertising that are located outside of the home. It is a sub-discipline of media planning and buying that specifically focuses on reaching consumers when they are away from home. Outdoor advertising typically involves buying space on billboards, buses, trains, and other forms of transit, as well as in other public spaces, such as shopping centers and airports. The goal of outdoor advertising is to create an effective campaign that will reach the target audience and achieve the desired marketing objectives. This includes analyzing the audience demographics, commuting patterns, and purchasing power, as well as assessing the costs and reach of different outdoor advertising options. Outdoor advertising can be a powerful way to reach consumers on the go and can be particularly effective for targeting specific geographic areas or demographics. Additionally, with the recent advancements in technology, it has become possible to target specific audience through digital billboards, that can change the ad displayed on them in real-time.