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In the fourth quarter of 2021, miscellaneous services and amusements spent roughly million U.S. dollars on outdoor advertising in the United States. This category spent more than twice as much as retail, which ranked second in the measured period.

OOH formats

Out-of-home (OOH) advertising comes in various forms, for example, billboards. Within the billboard category, there were roughly *** thousand bulletins, *** thousand posters, and just under ** thousand digital billboards in the United States in 2021. In late 2021, billboards generated *** billion U.S. dollars in OOH ad revenue in the country making it the most profitable format by far. The transit format, which includes public transportation displays, generated about *** million U.S. dollars in the same period.

DOOH

Out-of-home digital media or DOOH includes formats, such as digital billboards and digital place-based networks. In 2021, DOOH ad spending in the United States was estimated to reach about *** billion U.S. dollars. By the end of 2023, this amount is expected to grow to over *** billion U.S. dollars.